added call_host_override test
diff --git a/grpc.gyp b/grpc.gyp
index 7235e33..9587bbf 100644
--- a/grpc.gyp
+++ b/grpc.gyp
@@ -2568,6 +2568,7 @@
         'test/core/end2end/tests/bad_ping.cc',
         'test/core/end2end/tests/binary_metadata.cc',
         'test/core/end2end/tests/call_creds.cc',
+        'test/core/end2end/tests/call_host_override.cc',
         'test/core/end2end/tests/cancel_after_accept.cc',
         'test/core/end2end/tests/cancel_after_client_done.cc',
         'test/core/end2end/tests/cancel_after_invoke.cc',
@@ -2656,6 +2657,7 @@
         'test/core/end2end/tests/bad_hostname.cc',
         'test/core/end2end/tests/bad_ping.cc',
         'test/core/end2end/tests/binary_metadata.cc',
+        'test/core/end2end/tests/call_host_override.cc',
         'test/core/end2end/tests/cancel_after_accept.cc',
         'test/core/end2end/tests/cancel_after_client_done.cc',
         'test/core/end2end/tests/cancel_after_invoke.cc',