Fix mounting of USB OTG

Pulled from HammerHead to fix OTG Mount support in fstab and init.qcom.rc

Change-Id: I300714c7b2413cb3d8fe4e8b438c92f4d0f0000e
more cache tweaks

Startup hangs continue unabated. Kill filesystem check on cache on
startup, but increase protections against corruption.

Change-Id: I4f4fc58ad89c3274135fc6d0060d3478b23b7f18