Add custom arm-eabi-4.4.3 repos, remove old jb-mr0 prebuilt repo

Note this change obsoletes the old jb-mr0 prebuilt repo:

https://github.com/AOKP/build/commit/218fde3f9c8ffc7c9503f0bac2715ce5301b6c57

Change-Id: I941128d53874b8bf0ded328fbd110f9231ba299b