docs: Fixed alphabetization on Play Store icons page.

Fixed alphabetization of "Get it on Google Play" section (Afrikans
now correctly comes before Amharic). You can check this at:

http://asolovay.mtv:9053/distribute/tools/promote/badge-files.html

The two bad links (for the "Get it  on Google Play" badges for
Croatian and Hong Kong Chinese) have also been fixed, but to
verify this, you need to go to the live site:

http://developer.android.com/distribute/tools/promote/badge-files.html

bug: 14588953
Change-Id: I71d6ce3c34712ea98e5f9f5cc837c58813dee494