Update CM's repopick python script

Signed-off-by: Andre Saddler <dresadd09691@gmail.com>
Change-Id: Ic6a3fa2950aac3596c5547c9811791bbcf2ebe33
Repopick: update legacy gerrit api

Change-Id: Ic21c2aac1c27f29e1ee052b277dd6497342889b2
Repopick: remove legacy gerrit port

Change-Id: Ib1a7be3399eaac9f24dd835dc003c4ebb7ac4856
Merge branch 'kitkat' of https://github.com/AOSPA-legacy/android_build into HEAD