GitLab

Move all awk scripts to build/awk/ and rework them a bit

Add build/awk/xmlparser.awk to parse XML files into something that
is easier to process with awk. Its output is used by several
scripts now (extract-debuggable.awk, extract-package-name.awk and
the new extract-launchable.awk).

Also update documentation.

Change-Id: I50507abbb2b438aeea25a4e0521e6bf69ad86603