build: add missing logging_vty_test.vty to EXTRA_DIST

It was introduced and forgotten to add to EXTRA_DIST in:

"logging vty: add VTY transcript test"
commit 3a9ff11e574fa7ee19b1062b2c90151dbf7f0e27
change-Id I948e832a33131f8eab98651d6010ceb0ccbc9a9c

Change-Id: I1bcedf3097f02b2adc679560d1cbceb27dbc345e
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 028abc2..a307886 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -246,6 +246,7 @@
              gprs/gprs_test.ok kasumi/kasumi_test.ok			\
              msgfile/msgfile_test.ok msgfile/msgconfig.cfg		\
              logging/logging_test.ok logging/logging_test.err		\
+             logging/logging_vty_test.vty				\
              fr/fr_test.ok loggingrb/logging_test.ok			\
              loggingrb/logging_test.err	strrb/strrb_test.ok		\
              codec/codec_test.ok \