Add common to SUBDIRS and generate common/Makefile and common/m4/Makefile.

Original commit message from CVS:
* Makefile.am:
* configure.ac:
Add common to SUBDIRS and generate common/Makefile and
common/m4/Makefile.

ChangeLog

+2008-12-05  Sebastian Dröge  <sebastian.droege@collabora.co.uk>
+
+	* Makefile.am:
+	* configure.ac:
+	Add common to SUBDIRS and generate common/Makefile and
+	common/m4/Makefile.
+
 2008-12-04  Sebastian Dröge  <sebastian.droege@collabora.co.uk>
 
 	* configure.ac:

Makefile.am

-SUBDIRS = codegen gst examples testsuite pkgconfig
+SUBDIRS = common codegen gst examples testsuite pkgconfig
 
 common_cflags = $(PYTHON_INCLUDES) $(PYGOBJECT_CFLAGS) $(GST_CFLAGS) $(GST_OPTION_CFLAGS) -fno-strict-aliasing
 common_libadd = $(GST_LIBS) $(GST_OPTION_LIBS)

configure.ac

@@ -339,6 +339,8 @@ AG_GST_VALGRIND_CHECK
 AC_OUTPUT([
   Makefile
   codegen/Makefile
+  common/Makefile
+  common/m4/Makefile
   gst/Makefile
   gst/gstversion.override
   gst/extend/Makefile