Autogen python test config.

Feature request from developer, autogen python test config.

Bug:118442443

Test: $source build/envsetup.sh ; lunch
      $sed -i '/test_config/d' tools/acloud/Android.bp
      $make acloud_test
      $[ -f $ANDROID_HOST_OUT_TESTCASES/acloud_test/acloud_test.config ] && echo "Found" || echo "Not found"

Change-Id: I196230581b456afe03e67f9cd84c028d18ba08d9
diff --git a/tradefed/makevars.go b/tradefed/makevars.go
index 3ec7997..aad7273 100644
--- a/tradefed/makevars.go
+++ b/tradefed/makevars.go
@@ -30,6 +30,7 @@
 	ctx.Strict("NATIVE_BENCHMARK_TEST_CONFIG_TEMPLATE", "${NativeBenchmarkTestConfigTemplate}")
 	ctx.Strict("NATIVE_HOST_TEST_CONFIG_TEMPLATE", "${NativeHostTestConfigTemplate}")
 	ctx.Strict("NATIVE_TEST_CONFIG_TEMPLATE", "${NativeTestConfigTemplate}")
+	ctx.Strict("PYTHON_BINARY_HOST_TEST_CONFIG_TEMPLATE", "${PythonBinaryHostTestConfigTemplate}")
 
 	ctx.Strict("EMPTY_TEST_CONFIG", "${EmptyTestConfig}")
 }