v4l2object: Orphan buffer pool on object_stop if supported

Use V4L2 buffer orphaning, on recent kernels so that
the device can be restarted immediately with
a new buffer pool during renogatiation.
20 jobs for v4l2src_buffer_orphan in 90 minutes and 54 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Preparation
passed #333770
gst indent

00:00:16

passed #333769
manifest

00:00:41

 
  Build
passed #333771
build fedora x86_64

00:05:39

passed #333772
build nodebug fedora x86_64

00:06:15

passed #333773
build static fedora x86_64

00:11:24

passed #333774
build static nodebug fedora x86_64

00:10:45

 
  Test
passed #333775
check fedora

00:05:37

passed #333776
integration testsuites fedora

00:10:15

 
  Full Builds
passed #333778
build cerbero android universal

00:11:41

passed #333989
build cerbero cross win32

00:12:34

passed #333780
build cerbero cross win64

00:07:47

passed #333990
build cerbero fedora x86_64

00:11:27

failed #333779
build cerbero cross win32

00:07:03

failed #333777
build cerbero fedora x86_64

00:07:24

 
  Full Tests
passed #333782
valgrind bad

00:17:40

passed #333783
valgrind ges

00:07:59

passed #334202
valgrind good

00:11:37

failed #333781
valgrind good

00:24:14

 
  Apps
passed #333784
android universal examples

00:08:53

 
  Deploy
passed #333785
documentation

00:06:04