gstconfig: Put gstconfig.h into $(libdir)/gstreamer-1.0/include

It's architecture dependent and should not be placed into the include
directory as the assumption is that all those headers are architecture
independent.

https://bugzilla.gnome.org/show_bug.cgi?id=739767

gst/Makefile.am

@@ -41,7 +41,8 @@ DIST_SUBDIRS = parse printf
 # make variables for all generated source and header files to make the
 # distinction clear
 
-built_header_configure = gstconfig.h gstversion.h
+built_header_configure = gstversion.h
+built_sys_header_configure = gstconfig.h
 built_header_make = gstenumtypes.h
 built_source_make = gstenumtypes.c
 
@@ -126,12 +127,13 @@ nodist_libgstreamer_@GST_API_VERSION@_la_SOURCES = $(built_source_make)
 # BUILT_SOURCES are built on make all/check/install before all other targets
 BUILT_SOURCES = \
         $(built_header_configure)	\
+        $(built_sys_header_configure)	\
         $(built_header_make)		\
         $(built_source_make)
 # CLEANFILES is for files generated by make
 CLEANFILES = $(built_header_make) $(built_source_make) $(as_dll_cleanfiles) *.gcno *.gcda *.gcov *.gcov.out
 # DISTCLEANFILES is for files generated by configure
-DISTCLEANFILES = $(built_header_configure)
+DISTCLEANFILES = $(built_header_configure) $(built_sys_header_configure)
 
 libgstreamer_@GST_API_VERSION@_la_CFLAGS =		\
 	-D_GNU_SOURCE					\
@@ -225,6 +227,9 @@ libgstreamer_@GST_API_VERSION@include_HEADERS = $(gst_headers) math-compat.h
 nodist_libgstreamer_@GST_API_VERSION@include_HEADERS = \
 	$(built_header_configure) $(built_header_make)
 
+configexecincludedir = $(libdir)/gstreamer-@GST_API_VERSION@/include/gst
+nodist_configexecinclude_HEADERS = $(built_sys_header_configure)
+
 noinst_HEADERS = 		\
 	gettext.h		\
 	glib-compat-private.h	\

pkgconfig/gstreamer.pc.in

@@ -15,4 +15,4 @@ Version: @VERSION@
 Requires: glib-2.0, gobject-2.0
 Requires.private: gmodule-no-export-2.0
 Libs: -L${libdir} -lgstreamer-@GST_API_VERSION@
-Cflags: -I${includedir}
+Cflags: -I${includedir} -I${libdir}/gstreamer-@GST_API_VERSION@/include