CM11 Themes: Store hash codes for target and overlay in idmap

Due to some system packages always having the same last modified
time stamp of 08/01/2008 we must use some other unique value to
determine that the contents of either the target or the overlay
have changed.  This unique value will be passed down from the java
layer and written to the idmap header.

This change requires the following patch from frameworks/base
http://review.cyanogenmod.org/62565

Change-Id: I0adcafaca96110268766d6e3349414364ecea4c3
CM11 Themes: Pipe stderr from aapt to logcat.

This will allow users to see why aapt failed when installing a
theme.

Change-Id: I74314daae9e844dce2f4c3eeb6c78a40b5ad6357
CM11 Themes: Common overlay for sharing resources. [2/2]

Change-Id: Ied21ede2f36ba16dd190bc1e6cec44fd8560ca90
Themes: Fix -110 install error [1/2]

aapt was being called from PM with a ' ' at the end of the cmd. This would
cause installd to read unexpected parts of memory which sometimes
causes it to parse the command incorrectly.

Change-Id: Id9f1170db05b40f030d6ea5009bed38bc9fc3b5f