Enable more gstreamer plugins

When diffing /usr/lib/gstreamer-1 of the 3.28 SDK and what will become 3.30 I noticed we where missing couple gst plugins.

This should take care of a good bunch of them. Waiting to build to check if we got them all or not.

 ➜  gnome-build-meta git:(staging-3-30) ✗ diff -u 328 next_with_audio
--- 328 2018-09-06 17:42:04.005835046 +0300
+++ next_with_audio 2018-09-07 13:51:10.787051325 +0300
@@ -1,4 +1,5 @@
 include
+libcluttergst3.la
 libcluttergst3.so
 libgstaccurip.so
 libgstadder.so
@@ -32,9 +33,9 @@
 libgstbz2.so
 libgstcairo.so
 libgstcamerabin.so
+libgstcogl.la
 libgstcogl.so
 libgstcoloreffects.so
-libgstcolormanagement.so
 libgstcompositor.so
 libgstcoreelements.so
 libgstcoretracers.so
@@ -86,16 +87,18 @@
 libgstjpegformat.so
 libgstjpeg.so
 libgstkms.so
+libgstlame.so
 libgstlegacyrawparse.so
 libgstlevel.so
+libgstlibav.la
 libgstlibav.so
 libgstmatroska.so
 libgstmidi.so
+libgstmonoscope.so
 libgstmpegpsdemux.so
 libgstmpegpsmux.so
 libgstmpegtsdemux.so
 libgstmpegtsmux.so
-libgstmpg123.so
 libgstmulaw.so
 libgstmultifile.so
 libgstmultipart.so
@@ -103,7 +106,6 @@
 libgstnavigationtest.so
 libgstnetsim.so
 libgstogg.so
-libgstopenal.so
 libgstopenglmixers.so
 libgstopengl.so
 libgstopusparse.so
@@ -118,7 +120,6 @@
 libgstpnm.so
 libgstproxy.so
 libgstpulseaudio.so
-libgstpython.cpython-35m-x86_64-linux-gnu.so
 libgstrawparse.so
 libgstremovesilence.so
 libgstreplaygain.so
@@ -136,7 +137,6 @@
 libgstsmooth.so
 libgstsmoothstreaming.so
 libgstsmpte.so
-libgstsndfile.so
 libgstsoup.so
 libgstspectrum.so
 libgstspeed.so
@@ -150,8 +150,6 @@
 libgstttmlsubs.so
 libgsttypefindfunctions.so
 libgstudp.so
-libgstvcdsrc.so
-libgstvdpau.so
 libgstvideo4linux2.so
 libgstvideobox.so
 libgstvideoconvert.so