Support URLs with other parameters next to ${size}

The sizeParameter was just appended to the URL after a '?'.
This did not work when the URL itself already contained a '?'.
Now check for existing parameters and insert a '&' instead.

This way, we now support URLs of e.g.:

Change-Id: I10781a04eeec8bbe68451fab38942a0e305b27f4
1 file changed
tree: f9bf4c3fff69fd57d7c3b00528081c6c7ce08fbd
  1. .settings/
  2. src/
  3. .gitignore
  4. BUCK