make clean should remove gen-go folder
diff --git a/lib/go/test/Makefile.am b/lib/go/test/Makefile.am
index ec4011b..c13ba74 100644
--- a/lib/go/test/Makefile.am
+++ b/lib/go/test/Makefile.am
@@ -57,7 +57,7 @@
 	GOPATH=`pwd`/gopath $(GO) test thrift tests
 
 clean-local:
-	$(RM) -r gopath ThriftTest.thrift
+	$(RM) -r gopath ThriftTest.thrift gen-go
 
 client: stubs
 	$(GO) run TestClient.go