Fix (hackily) fling_stream_test under gyp

.gitignore

@@ -39,3 +39,7 @@ report.xml
 
 # port server log
 portlog.txt
+
+# gyp generated make files
+*-gyp.mk
+out

tools/run_tests/run_tests.py

@@ -199,7 +199,9 @@ class GYPCLanguage(object):
     return [['gyp', '--depth=.', '--suffix=-gyp', 'grpc.gyp']]
 
   def make_targets(self):
-    return gyp_test_paths(False)
+    # HACK(ctiller): force fling_client and fling_server to be built, as fling_test
+    # needs these
+    return gyp_test_paths(False) + ['fling_client', 'fling_server']
 
   def build_steps(self):
     return []