clang-format: [JS] Make Closure module detection more narrow.

Before:
  var MyLongClassName = goog.module.get('my.long.module.name.followedBy.MyLongClassName');

After:
  var MyLongClassName =
      goog.module.get('my.long.module.name.followedBy.MyLongClassName');

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@222888 91177308-0d34-0410-b5e6-96231b3b80d8