make clean should rm src/gen instead of emptying
diff --git a/test/go/Makefile.am b/test/go/Makefile.am
index 3ac1d8b..66f81ad 100644
--- a/test/go/Makefile.am
+++ b/test/go/Makefile.am
@@ -45,7 +45,7 @@
 	GOPATH=`pwd` $(GO) install bin/stress
 
 clean-local:
-	$(RM) -r src/gen/* src/code.google.com src/thrift bin pkg gopath ThriftTest.thrift
+	$(RM) -r src/gen src/code.google.com src/thrift bin pkg gopath ThriftTest.thrift
 
 check: gopath
 	GOPATH=`pwd` $(GO) test -v common/...