[qtwebkit/f16] (5 commits) ...add comment

[Than Ngo]

Summary of changes:

  22b2156... fix FTBFS against newer glib (*)
  69980c3... add explicit BR: libjpeg-devel libpng-devel (*)
  cf9a32a... qtwebkit-2.2.1 add explicit BR: pkgconfig(xext) pkgconfig(x (*)
  86c4a22... backport the correct patch from trunk to fix glib-2.31 issu (*)
  15b5dce... add comment (*)

(*) This commit already existed in another branch; no separate mail sent