gstreamer: add -fglasgow-exts for M.S.G.Core.{Types,Caps} in Makefile.am
gstreamer: add -fglasgow-exts for M.S.G.Core.{Types,Caps} in Makefile.am

gtk2hs/webkit,gtk2hs/webkit,gtk2hs/gstreamer,gtk2hs/webkit,gtk2hs/vte,gtk2hs/vte