memcheck/tests/Makefile.am include filter_dw4 in dist_noinst_SCRIPTS.

The fix for BZ#331254 (r13814) added filter_dw4.
Make sure it is always included in the dist.

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13825 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/memcheck/tests/Makefile.am b/memcheck/tests/Makefile.am
index abb6360..c78eea6 100644
--- a/memcheck/tests/Makefile.am
+++ b/memcheck/tests/Makefile.am
@@ -42,6 +42,7 @@
 dist_noinst_SCRIPTS = \
 	filter_addressable \
 	filter_allocs \
+	filter_dw4 \
 	filter_leak_cases_possible \
 	filter_stderr filter_xml \
 	filter_strchr \