tests: target 'check-local' does not depend on BUILT_SOURCES

Change-Id: I6cef8024cc10998b29e2bf7fc64c4c98fed7d8dd
diff --git a/tests/Makefile.am b/tests/Makefile.am
index d1021ee..fdc0a6c 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -244,7 +244,7 @@
 	@echo "Not running python-based tests (determined at configure-time)"
 endif
 
-check-local: atconfig $(BUILT_SOURCES) $(TESTSUITE)
+check-local: atconfig $(TESTSUITE)
 	$(SHELL) '$(TESTSUITE)' $(TESTSUITEFLAGS)
 	$(MAKE) $(AM_MAKEFLAGS) python-tests