Add ".multi" to the suffix for both Android builds so the correct multilocale builds show up on nightly.mozilla.org.
Update the Android links to point to the multilocale apks (bug 791482)
Forgot to strip off the en-US/ part of the URL.
Looks good; in the future, could you please rebase your commits for a pull request into a single commit. Especially when one fixes a mistake in the previous commit like 67fb495.