[gtk+] Fix introspection build when builddir != srcdir

[Emilio Pozuelo Monfort <epm src gnome org>]

commit cfc70ca71bb77a041afb64b09d9782d481ed4315
Author: Emilio Pozuelo Monfort <pochu27 gmail com>
Date:   Tue Jan 4 20:24:47 2011 +0000

    Fix introspection build when builddir != srcdir
    
    So gdk/gdk.h can find gdk/gdkconfig.h, which is in $builddir
    because it's generated.

 gdk/Makefile.am |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gdk/Makefile.am b/gdk/Makefile.am
index 80387cc..6c16c42 100644
--- a/gdk/Makefile.am
+++ b/gdk/Makefile.am
@@ -35,6 +35,7 @@ INCLUDES = 				\
 	-DG_LOG_DOMAIN=\"Gdk\"		\
 	-DGDK_COMPILATION		\
 	-I$(top_srcdir)			\
+	-I$(top_builddir)		\
 	-I$(top_builddir)/gdk		\
 	$(GTK_DEBUG_FLAGS)		\
 	$(GDK_DEP_CFLAGS)