meson: Add pbtypes plugin

gst/meson.build

@@ -6,6 +6,7 @@ subdir('audioresample')
 subdir('audiotestsrc')
 subdir('encoding')
 subdir('gio')
+subdir('pbtypes')
 subdir('playback')
 subdir('subparse')
 subdir('tcp')

gst/pbtypes/meson.build

@@ -0,0 +1,12 @@
+gstpbtypes_sources = [
+  'gstpbtypes.c'
+  ]
+
+gstpbtypes = library('gstpbtypes',
+  gstpbtypes_sources,
+  c_args : gst_plugins_base_args,
+  include_directories: [configinc, libsinc],
+  dependencies : [video_dep],
+  install : true,
+  install_dir : plugins_install_dir,
+)