Fix build on a system with a USE=nocxx gcc

From http://svn.gnome.org/viewvc/gtk%2B?view=revision&revision=19688 and backported,
as the order of tests listed was juggled around in trunk:

2008-03-02  Johan Dahlin

	* tests/Makefile.am (noinst_PROGRAMS): Remove autotestkeywords, it's added later,
	fixes non-C++ build.
	(#496032, Nelson Benitez)

--- trunk/tests/Makefile.am	2008/03/02 15:31:49	19687
+++ trunk/tests/Makefile.am	2008/03/02 17:19:52	19688
@@ -54,7 +54,6 @@
 
 noinst_PROGRAMS =  $(TEST_PROGS)	\
 	autotestfilechooser		\
-	autotestkeywords		\
 	floatingtest			\
 	buildertest			\
 	simple				\