basesrc: Downgrade EOS warning

In the case of pushfilesrc, this is the expected behaviour, so let's
downgrade the warning to a debug message to avoid confusing users.
17 jobs for basesrc-eos in 63 minutes and 43 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Preparation
passed #246786
gst indent

00:00:43

passed #246785
manifest

00:00:38

 
  Build
passed #246787
build fedora x86_64

00:06:23

passed #246788
build nodebug fedora x86_64

00:04:42

 
  Test
passed #246789
check fedora

00:10:52

passed #246790
integration testsuites fedora

00:11:11

 
  Full Builds
passed #246792
build cerbero android universal

00:11:31

passed #246793
build cerbero cross win32

00:07:57

passed #246794
build cerbero cross win64

00:04:59

passed #246791
build cerbero fedora x86_64

00:05:32

 
  Full Tests
passed #246799
valgrind bad

00:12:28

passed #246796
valgrind base

00:13:43

passed #246795
valgrind core

00:11:02

passed #246800
valgrind ges

00:06:41

passed #246797
valgrind good

00:14:48

passed #246798
valgrind ugly

00:02:03

 
  Apps
passed #246801
android universal examples

00:19:02