Fix link for "Android Hive Tutorials"

The link used for the site "Android Hive Tutorials" was missing the
"http://" prefix.

This caused github to link to
"https://github.com/JStumpp/awesome-android/blob/master/www.androidhive.info"
when reading the file in the github interface.
Merge pull request #6 from rolpereira/master

Fix link for "Android Hive Tutorials"