Use GST_CXXFLAGS and GST_CFLAGS to pull in local gst-libs includes.

Move the GST_CXXFLAGS and GST_CFLAGS to the start of the includes set
to pull in the local gst-libs from there first, instead of listing
it explicitly.

ext/dirac/Makefile.am

@@ -5,8 +5,8 @@ libgstdirac_la_SOURCES = \
 	gstdiracenc.cc
 
 libgstdirac_la_CXXFLAGS = \
-        -I$(top_srcdir)/gst-libs/gst/video \
-        $(GST_PLUGINS_BASE_CFLAGS) $(GST_CXXFLAGS) $(DIRAC_CFLAGS) \
+        $(GST_CXXFLAGS) \
+        $(GST_PLUGINS_BASE_CFLAGS) $(DIRAC_CFLAGS) \
 	-DGST_USE_UNSTABLE_API
 libgstdirac_la_LIBADD = \
 	$(top_builddir)/gst-libs/gst/video/libgstbasevideo-@GST_MAJORMINOR@.la \

ext/schroedinger/Makefile.am

@@ -11,10 +11,9 @@ libgstschro_la_SOURCES = \
 	gstschroparse.c \
 	gstschroutils.c
 libgstschro_la_CFLAGS = \
-        -I$(top_srcdir)/gst-libs/gst/video \
+	$(GST_CFLAGS) \
 	$(GST_PLUGINS_BASE_CFLAGS) \
         $(GST_BASE_CFLAGS) \
-	$(GST_CFLAGS) \
 	-DGST_USE_UNSTABLE_API \
 	$(SCHRO_CFLAGS)
 libgstschro_la_LIBADD = \