Merge pull request #3410 from adam-26/1745

Fix issue #1745 - javascript allow dot in filename

src/google/protobuf/compiler/js/js_generator.cc

@@ -193,6 +193,7 @@ string ModuleAlias(const string& filename) {
   string basename = StripProto(filename);
   StripString(&basename, "-", '$');
   StripString(&basename, "/", '_');
+  StripString(&basename, ".", '_');
   return basename + "_pb";
 }