Added block burst_sink_qa for unit testing of burst-based blocks
diff --git a/grc/misc_utils/gsm_burst_sink_qa.xml b/grc/misc_utils/gsm_burst_sink_qa.xml
new file mode 100644
index 0000000..c028da3
--- /dev/null
+++ b/grc/misc_utils/gsm_burst_sink_qa.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0"?>
+<block>
+  <name>QA Burst sink</name>
+  <key>gsm_burst_sink_qa</key>
+  <import>import grgsm</import>
+  <make>grgsm.burst_sink_qa()</make>
+
+  <sink>
+    <name>in</name>
+    <type>message</type>
+  </sink>
+</block>