purge unneeded APG Intent test buttons, they're in gnupg-for-android-tests

this basically reverts:
"setup APG Intent test buttons"
8693c7c3958b11a4e3d4a157a8cf8c70973e663e
fix my stupid mistake in run-tests.sh
rename 'main.xml' to 'debug_log.xml' since that is all it does now
include gnupg-static by default in external/ build

on order for it to work, it needs to be done in the right order, and it
doesn't take so long, and we're using it in the jenkins builds...