Fix go tests.

tests.sh

@@ -105,7 +105,7 @@ build_golang() {
   export PATH="`pwd`/src:$PATH"
 
   export GOPATH="$HOME/gocode"
-  mkdir -p "$GOPATH/src/github.com/google"
+  mkdir -p "$GOPATH/src/github.com/protocolbuffers"
   rm -f "$GOPATH/src/github.com/protocolbuffers/protobuf"
   ln -s "`pwd`" "$GOPATH/src/github.com/protocolbuffers/protobuf"
   export PATH="$GOPATH/bin:$PATH"