cogl-gst: video-sink: fix not installed rgb shader

Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 07114acc40406e3e0fa79ae6195836d56397fdfa)
cogl-path: Fix the exported symbols regular expression

The Cogl 1.x API exports cogl_set_path() and cogl_get_path(), which
means that the regular expression needs to catch those two symbols
as well.

https://bugzilla.gnome.org/show_bug.cgi?id=722765

Reviewed-by: Neil Roberts <neil@linux.intel.com>
cogl2: add boilerplate to define fundamental types
pipeline: add introspection support
texture: add introspection support
texture-2d: add introspection support
texture-2d-sliced: add introspection support
texture-3d: add introspection support
texture-rectangle: add introspection support
atlas-texture: add introspection support
sub-texture: add introspection support
bitmap: add introspection support
color: add introspection support
framebuffer: add introspection support
onscreen: add introspection support
context: add introspection support
renderer: add introspection support
display: add introspection support
primitive: add introspection support
attribute: add introspection support