libs: add libpackagelistparser

There are 4 components that all implement package parsing, they are:
1. sdcardd
2. libselinux
3. logd
4. runas

Create a library that can be used by all of them, and new ones as needed.

Change-Id: I87a406802f95d8e7bfd8ee85f723f80e9e6b6c0c
Signed-off-by: William Roberts <william.c.roberts@intel.com>