Update upstream tags to android-4.3_r2.2

Change-Id: I6c22319cd2db9e1939107e7e677228f5a8e33818
Add pigz repository

 * pigz is an optimized gzip which uses multiple cores
 * We're using pigz for compressed Nandroid support in recovery

Change-Id: I87c5d2f9b67e7104c75460279eb640fdfa99d9b7