Fixes build with omx >= 1.2.0

gstomx.c:1405:10: error: ‘OMX_IndexParamCustomContentPipe’ undeclared (first use in this function)
    case OMX_IndexParamCustomContentPipe

Some enums have been deprecated in 1.2.0

gstreamer/gst-omx#27
4 jobs for tizonia_fixes in 6 minutes and 9 seconds (queued for 1 second)
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passed #242394
gst indent

00:00:23

passed #242393
manifest

00:00:42

 
  Build
passed #242395
build fedora x86_64

00:05:27

passed #242396
build nodebug fedora x86_64

00:05:13