Implemented message sink block for unit testing
diff --git a/grc/misc_utils/CMakeLists.txt b/grc/misc_utils/CMakeLists.txt
index 403a321..5dd4c1b 100644
--- a/grc/misc_utils/CMakeLists.txt
+++ b/grc/misc_utils/CMakeLists.txt
@@ -29,6 +29,7 @@
     gsm_burst_sink.xml
     gsm_burst_source.xml
     gsm_burst_source_qa.xml
-    gsm_burst_sink_qa.xml 
-    gsm_message_source.xml DESTINATION share/gnuradio/grc/blocks
+    gsm_burst_sink_qa.xml
+    gsm_message_source.xml
+    gsm_message_sink.xml DESTINATION share/gnuradio/grc/blocks
 )