KVT49I
.1 becomes .2

Change-Id: Ib4208e24e66b05ff441302a817be22ea213eb1df
KVT49K
"KVT49L"
releasetools: don't create prebuilt_dir path if it exits

This path may already exists from previous build tasks. Attempting
to create it again will cause an error.

Change-Id: I4baad8bc846470b99f6ce9207c0682401406decc
Merge tag 'android-4.4.2_r2' into HEAD

Android 4.4.2 Release 2

Change-Id: I2a28b37dbde948ebb06ebfe4e6a57e42405f9f40
Merge branch "cm-11.0" into kylin