[webkit-gtk] GLES is now required

[Michael Catanzaro]

Hi distributors,

WebKitGTK 2.42 now always uses GLES in the web process; previously, it 
could use either desktop GL or GLES, and would generally have been 
using GL in most Linux distros. (The UI process will use either GL or 
GLES depending on which is used by GTK itself.)

Please make sure your WebKitGTK packages have a runtime dependency on 
libGLESv2 or libepoxy will crash [1].

Thanks!

[1] https://bugzilla.redhat.com/show_bug.cgi?id=2240428