Build: update qcom_utils.mk

Add build macro to determine Android Release

Adding platform sdk version 18 for JB MR2.

Change-Id: I79aa831ddd335bd14bd777506c210acc5d9960f1
inline kernel dtb build

also add sony device filter

Change-Id: Iffeda58c7086f49e76ecafd37941503611346983
Merge branch 'jb43-legacy' of https://github.com/ParanoidAndroid/android_build into jb4.3