Add test mapping

Bug: 315371696
Change-Id: If8448e703cc5accde11bcdccf7585ef6779f59b0
diff --git a/libprocessgroup/TEST_MAPPING b/libprocessgroup/TEST_MAPPING
new file mode 100644
index 0000000..29a9ff0
--- /dev/null
+++ b/libprocessgroup/TEST_MAPPING
@@ -0,0 +1,7 @@
+{
+  "postsubmit": [
+    {
+      "name": "StagedRollbackTest"
+    }
+  ]
+}