ramdisk: fix sdcard mount

Change-Id: I4055147f99687b808efb57244501ec6fd1209913
msm8660: add dummy open() of /dev/smd0 to avoid in-call audio race condition (David Ferguson)
ramdisk: update vibrator permissions

Change-Id: I78281ee5fa5bac5ffff882573d58bbf95b86274c