package/gst1-shark: select BR2_PACKAGE_GSTREAMER1_GST_DEBUG

gst-shark needs gstreamer to be compiled with debugging support enabled.
Make this selection automatically when the gst-shark package is
selected.

Fixes:
 - http://autobuild.buildroot.net/results/09b894b0775df2dd87d8fb2d53c6a243d8668aba/


 - and many more

Signed-off-by: Chris Packham <judge.packham@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>