Fix /data backup size if contains media subdirs

/data/*/media directories are mistakenly being excluded from the size
calculation. Change to absolute dir exclude so that only /data/media is
excluded.

Change-Id: I6e97604d44e6ea2bdf7dfd8c68a2f90ba6d44415
correctly mount tmpfs as /tmp in recovery

The syntax of init's mount command changed in April 2008 but
recovery's init.rc was never updated, so recovery's /tmp has been on
the root fs all this time.  Fix.

Also add /system/bin to the PATH in recovery, which is handy for
debugging.

Change-Id: I9e60d18803906bc75c263f12c8863cfd6a14147b
Add HTC charging LED support

Original implementation by Tom Hite, only slightly modified by Matt
Mower.

Change-Id: Ibc73bf04f122f5de1702f8beeccc468a9a1a2e95