winsys-wgl: Don't include cogl.h

Since 248a76f5eac7e5ae4fb45208577f9a55360812a7 cogl.h can no longer be
included in internal source files so the WGL winsys was no longer
compiling.

Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 91af97a2a27ab5ad3e7eaabebd03503b685d4d42)
mingw-fetch-dependencies: Add the -L option when using curl

The -L option makes curl follow redirections. This is needed for
downloading glext.h because khronos.org is using a redirect.

Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 85baaef4a4f4fd3a03c7c9f05002eae483ddd6b3)
Updates NEWS for the 1.17.2 release
Release 1.17.2 (snapshot)
Post-release version bump to 1.17.3
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>