Absorb dho_gcc.xml into default

Change-Id: I2fa328756f8f93d93f1b285ae1a1a2320148c1af

Conflicts:
	default.xml
use a few linaro repos that have changed since we tracked them

Change-Id: I6162a0469fa2afd1abda588b91ec0b01d9fd8c13

Conflicts:
	default.xml