build: Move gdk/tests/ to testsuite/gdk/

This is a reorganization of the testsuite to be in the testsuite/
directory, so it can be installed from there.

Makefile.am

@@ -1,7 +1,7 @@
 ## Makefile.am for GTK+
 include $(top_srcdir)/Makefile.decl
 
-SRC_SUBDIRS = gdk gtk libgail-util modules demos tests perf examples
+SRC_SUBDIRS = gdk gtk libgail-util modules demos tests testsuite perf examples
 SUBDIRS = po po-properties $(SRC_SUBDIRS) docs m4macros build
 
 ACLOCAL_AMFLAGS = -I m4 ${ACLOCAL_FLAGS}

configure.ac

@@ -1785,6 +1785,8 @@ tests/css/Makefile
 tests/css/parser/Makefile
 tests/reftests/Makefile
 tests/visuals/Makefile
+testsuite/Makefile
+testsuite/gdk/Makefile
 docs/Makefile
 docs/reference/Makefile
 docs/reference/gdk/Makefile
@@ -1807,7 +1809,6 @@ gdk/win32/rc/Makefile
 gdk/win32/rc/gdk.rc
 gdk/quartz/Makefile
 gdk/wayland/Makefile
-gdk/tests/Makefile
 gdk/gdkversionmacros.h
 gtk/Makefile
 gtk/makefile.msc

gdk/Makefile.am

@@ -9,9 +9,9 @@ INTROSPECTION_COMPILER_ARGS = \
    --includedir=$(srcdir) \
    --includedir=.
 
-SUBDIRS = $(GDK_BACKENDS) . tests
+SUBDIRS = $(GDK_BACKENDS) .
 
-DIST_SUBDIRS = win32 x11 quartz broadway wayland tests
+DIST_SUBDIRS = win32 x11 quartz broadway wayland
 
 CLEANFILES =
 

testsuite/Makefile.am

@@ -0,0 +1,6 @@
+include $(top_srcdir)/Makefile.decl
+
+SUBDIRS = gdk
+
+-include $(top_srcdir)/git.mk
+