Use input switches to detect audio jack insertions

Change-Id: Icd845f5dfa043515e312b5b66df379e00297ed4b
Remove local copy of dtbtool, switch to common one

Change-Id: I30ac5f0729a500234534a6dbfd534c3ccc85cd62
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_device_lge_g2-common into cm-11.0