Merge libgdk and libgtk

This commit does a number of things:
- remove some dead wchar configury from configure.ac and gdkconfig.h
- repurpose gdkconfig.h as header that contains GDK_WINDOWING_foo
  macros for each included backend, include it in gdk.h and install
  it in $includedir instead of below $libdir
- drop the backend from the library names
- build libgdk-3.0.la as a convenience lib and include it in libgtk-3.0.la
It does not yet enable building multiple backends at the same time.

1 files changed, 1 insertions, 0 deletions

diff --git a/gdk/gdk.h b/gdk/gdk.h
index 529dc05949..938961e35f 100644
--- a/gdk/gdk.h
+++ b/gdk/gdk.h
@@ -29,6 +29,7 @@
 
 #define __GDK_H_INSIDE__
 
+#include <gdk/gdkconfig.h>
 #include <gdk/gdkapplaunchcontext.h>
 #include <gdk/gdkcairo.h>
 #include <gdk/gdkcolor.h>