Comment 6 for bug 133353

This patch cleans up awn.pc by removing a line that seems to have remained from the clutter pkgconfig file that I assume awn's pkgconfig file was originally copied from, and changes the Cflags line per https://bugs.launchpad.net/awn/+bug/133353/comments/3 . Created against 0.2-stable-testing, but it should apply against trunk. This change was originally in desktop-agnostic as of revision 23.