Fix runtest syntax.

Change-Id: Ief41103c14c30d53f6c2fe8af5511386d57894c2
diff --git a/testrunner/coverage/coverage_targets.py b/testrunner/coverage/coverage_targets.py
index a627671..1198805 100644
--- a/testrunner/coverage/coverage_targets.py
+++ b/testrunner/coverage/coverage_targets.py
@@ -50,7 +50,7 @@
     self._target_map= {}
 
   def __iter__(self):
-    return iter(self._target_map.values()
+    return iter(self._target_map.values())
 
   def Parse(self, file_path):
     """Parse the coverage target data from from given file path, and add it to