The tests/ subdir consists of stuff trying to run a generated file ('exo-csource'), which doesn't work on host systems

--- /tmp/Makefile.am	2008-10-30 09:23:41.000000000 +0100
+++ exo-0.3.4/Makefile.am	2008-10-30 09:24:03.011124000 +0100
@@ -23,8 +23,7 @@
 	pixmaps								\
 	po								\
 	po-doc								\
-	$(PYTHON_SUBDIR)						\
-	tests
+	$(PYTHON_SUBDIR)
 
 AUTOMAKE_OPTIONS =							\
 	1.8								\