tests/rlcmac: Don't check stderr output

Current stderr output is empty anyway, and not checking it allows
enavling different log levels to easily debug issues.

Change-Id: I5b12e919e08a6eeaad31a459e5a15fdee4d76a61
diff --git a/tests/Makefile.am b/tests/Makefile.am
index c599636..c9a376f 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -136,7 +136,7 @@
 
 EXTRA_DIST = \
 	testsuite.at $(srcdir)/package.m4 $(TESTSUITE)	\
-	rlcmac/RLCMACTest.ok rlcmac/RLCMACTest.err \
+	rlcmac/RLCMACTest.ok \
 	alloc/AllocTest.ok alloc/AllocTest.err \
 	tbf/TbfTest.err \
 	bitcomp/BitcompTest.ok bitcomp/BitcompTest.err \