Add f2fs to list of partition types in common.py

Change-Id: I9a54489c38009ca2970132b530164663b15c1337
Build: update qcom_utils.mk

Add build macro to determine Android Release

Adding platform sdk version 18 for JB MR2.

Change-Id: I79aa831ddd335bd14bd777506c210acc5d9960f1
Merge branch 'kk4.4' of git://github.com/SlimRoms/android_build into kk4.4