Don't return immediately from reboot commands.

The reboot commands return too fast, interfering with testing.
Add a pause(), which will allow the device time to complete the
reboot.

Change-Id: Ie9cc6eea67b7ff662ec71ea2329cbb94f8d55404
Bug: 11369303
Enable incremental builder to find files that moved, and
try to process them via patch + rename, instead of
delete + add.

b/11437930

Change-Id: I984349fbc9a8dac4379e00c0d66fc7d22c4eb834
Support recoveries without CONFIG_EXT4_FS_XATTR

If for some reason the recovery's kernel can't be replaced and has
no support for xattrs, use this. Chances are the system will break
unless you know what you're doing and compensate on the Android side

Change-Id: I09ff2cbd0ae68ec4f4b2a2e26acb6b0bc8b3569a