ramdisk: enable TRIM in lvm

Not sure if the underlying hardware supports it or not, but
enabling it here doesn't hurt

Change-Id: I3c2a8cd72a3e7bf1f260e128f6c55e201fe4ac54
aries: init: do not check for existance of update.zip

The file path is on /storage/sdcard0 instead of /sdcard
(and may even be on the external SD)

Change-Id: Ie9795cd3095ad21e5acca9d2c12a929f2604cc84
aries: use uncompressed ramdisk

The kernel already performs LZMA compression on the whole ramdisk,
so compressing it once using gzip increases the size. Using
uncompressed ramdisk reduced the size from 7.4 MB to 5.4 MB.

Requires http://review.cyanogenmod.org/63722

Change-Id: I8dcd03a4011367b68c96efb23f56348af12da79b