Python GDB intergration work for the build system.

Adds a --with-python=</path/to/python-config.sh> option.
Merge remote-tracking branch 'aosp/master'

Change-Id: I33e4a0b22e0732f59bc7524f8f4e7b823c8c2d57
Signed-off-by: Paul Beeler <sparksco@gmail.com>