Update CHANGES for 1.3.8.
Update CHANGES for 1.3.8.

Conflicts:
	CHANGES

Drooids/babeld,Gwendocg/babeldToS,jech/babeld,dtaht/babeld-shortrtt-metrics,jech/babeld,sudomesh/babeld,tcatm/babeld,wlanslovenija/babeld,boutier/babeld,Gwendocg/babeldToS,woniullb/babeld,wlanslovenija/babeld