tests/rlcmac: additionally match debug output of the CSN.1 codec

This would allow us to catch more bugs. Note that I had to remove
printing of pointer address to make the output deterministic.

Change-Id: I1a77441eb957353c919bc73f8e3a2e38f4a383a9
diff --git a/tests/testsuite.at b/tests/testsuite.at
index fe87ff9..8a319bd 100644
--- a/tests/testsuite.at
+++ b/tests/testsuite.at
@@ -5,7 +5,8 @@
 AT_SETUP([rlcmac])
 AT_KEYWORDS([rlcmac])
 cat $abs_srcdir/rlcmac/RLCMACTest.ok > expout
-AT_CHECK([$OSMO_QEMU $abs_top_builddir/tests/rlcmac/RLCMACTest], [0], [expout], [ignore])
+cat $abs_srcdir/rlcmac/RLCMACTest.err > experr
+AT_CHECK([$OSMO_QEMU $abs_top_builddir/tests/rlcmac/RLCMACTest], [0], [expout], [experr])
 AT_CLEANUP
 
 AT_SETUP([multi_slot])