Fixing as-needed issue

http://bugs.gentoo.org/313837

--- a/src/PixelCity/Makefile.am
+++ b/src/PixelCity/Makefile.am
@@ -23,3 +23,5 @@
 	Texture.cpp \
 	Visible.cpp \
 	World.cpp
+libPixelCity_la_LIBADD=@quesoglc_LIBS@
+libPixelCity_la_CFLAGS=@quesoglc_CFLAGS@