configure: read libomxil-bellagio.pc only when it exists

Currenly configure.ac will print a warning when one is missing the package.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Jon TURNEY <jon.turney@dronecode.org.uk>
Reviewed-by: Christian König <christian.koenig@amd.com>
1 file changed