build: recovery: disable ro.adb.secure

We have no way of authorizing adb in recovery and this locks the
user/developer out of adb

Change-Id: I7df53e05a9e605bec525e22ff6aae069a85a593f
Merge branch 'cm-10.1' of git://github.com/CyanogenMod/android_build into cm-10.1