utils.c: fix static build

Static build fails since version 1.17.1 and
gstreamer/gst-editing-services@1e488d43
on:

FAILED: tools/ges-launch-1.0
/srv/storage/autobuild/run/instance-2/output-1/host/bin/arm-linux-gcc  -o tools/ges-launch-1.0 tools/ges-launch-1.0.p/ges-validate.c.o tools/ges-launch-1.0.p/ges-launch.c.o tools/ges-launch-1.0.p/ges-launcher.c.o tools/ges-launch-1.0.p/utils.c.o -Wl,--as-needed -Wl,--no-undefined -Wl,-O1 -Wl,-Bsymbolic-functions -static -Wl,--start-group ges/libges-1.0.a /srv/storage/autobuild/run/instance-2/output-1/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/lib/libgstreamer-1.0.a /srv/storage/autobuild/run/instance-2/output-1/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/lib/libgobject-2.0.a /srv/storage/autobuild/run/instance-2/output-1/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/lib/libglib-2.0.a -pthread /srv/storage/autobuild/run/instance-2/output-1/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/lib/libpcre.a /srv/storage/autobuild/run/instance-2/output-1/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/lib/libffi.a /srv/storage/autobuild/run/instance-2/output-1/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/lib/libgmodule-2.0.a /srv/storage/autobuild/run/instance-2/output-1/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/lib/libgstbase-1.0.a /srv/storage/autobuild/run/instance-2/output-1/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/lib/libgstvideo-1.0.a /srv/storage/autobuild/run/instance-2/output-1/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/lib/libgstpbutils-1.0.a /srv/storage/autobuild/run/instance-2/output-1/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/lib/libgstaudio-1.0.a /srv/storage/autobuild/run/instance-2/output-1/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/lib/libz.a /srv/storage/autobuild/run/instance-2/output-1/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/lib/libgsttag-1.0.a /srv/storage/autobuild/run/instance-2/output-1/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/lib/libgstcontroller-1.0.a /srv/storage/autobuild/run/instance-2/output-1/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/lib/libgio-2.0.a /srv/storage/autobuild/run/instance-2/output-1/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/lib/libmount.a /srv/storage/autobuild/run/instance-2/output-1/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/lib/libblkid.a -lm -Wl,--end-group
/srv/storage/autobuild/run/instance-2/output-1/host/opt/ext-toolchain/bin/../lib/gcc/arm-buildroot-linux-uclibcgnueabi/8.3.0/../../../../arm-buildroot-linux-uclibcgnueabi/bin/ld: /srv/storage/autobuild/run/instance-2/output-1/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/lib/libc.a(err.os): in function `warn':
err.c:(.text+0x1d8): multiple definition of `warn'; tools/ges-launch-1.0.p/utils.c.o:utils.c:(.text+0x9bc): first defined here

So rename warn function to ges_warn
Also prefix ok, print and printerr function by ges_ for consistancy and
run gst-indent on tools/ges-launcher.c

Fixes:
 - http://autobuild.buildroot.org/results/2a528a1185644f5b23d26eb3f2b342e99aa1e493

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Part-of: <gstreamer/gst-editing-services!221>
29 jobs for !221 with backport-mr-216-into-1.18-master in 36 minutes and 38 seconds (queued for 6 seconds)
detached
Status Job ID Name Coverage
  Build Docker
passed #5730408
alpine amd64 manifest builder docker

00:00:17

passed #5730407
android docker

00:01:34

passed #5730405
cerbero fedora amd64 docker

00:02:21

passed #5730404
fedora amd64 docker

00:02:08

passed #5730410
gst-indent amd64 docker

00:00:17

 
  Preparation
passed #5730413
gst indent

00:00:19

passed #5730411
manifest

00:00:31

 
  Build
passed #5730431
gstreamer
build cerbero cross-android universal

00:13:24

passed #5730437
gst-ios-13.2
build cerbero cross-ios universal

00:32:09

passed #5730433
gstreamer
build cerbero cross win32

00:09:30

passed #5730435
gstreamer
build cerbero cross win64

00:06:44

passed #5730429
gstreamer
build cerbero fedora x86_64

00:06:50

passed #5730436
gst-macos-10.15
build cerbero macos x86_64

00:11:50

passed #5730420
build clang fedora x86_64

00:07:04

manual #5730426
docker windows 1809 allowed to fail manual
build msys2
passed #5730415
build nodebug fedora x86_64

00:05:56

passed #5730416
build static fedora x86_64

00:05:54

passed #5730418
build static nodebug fedora x86_64

00:04:24

passed #5730421
docker windows 1809
build vs2017 amd64

00:09:13

passed #5730424
docker windows 1809
build vs2017 x86

00:09:50

 
  Test
passed #5730438
gstreamer
check fedora

00:08:32

passed #5730439
gstreamer
integration testsuites fedora 1/4

00:13:30

passed #5730440
gstreamer
integration testsuites fedora 2/4

00:19:59

passed #5730441
gstreamer
integration testsuites fedora 3/4

00:15:03

passed #5730442
gstreamer
integration testsuites fedora 4/4

00:18:52

passed #5730443
gstreamer
valgrind ges

00:07:51

 
  Integrate
passed #5730444
cross-android universal examples

00:05:29

passed #5730446
gst-ios-13.2
cross-ios universal examples

00:01:28

passed #5730445
documentation

00:17:39