overlay: config item for SIM Hot Swap support

Change-Id: I92f9a9b92c42189a997b86243e55bf29f10294ab
Merge remote-tracking branch 'upstream/cm-10.2' into cm-10.2
Merge branch 'cm-10.2' of https://github.com/razrqcom-dev-team/android_device_motorola_msm8960-common into jb3