layers.txt: switch to danny branches for more layers

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
layerman: activate minnow and allwinner layers

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
layerman: all our linaro patches are upstream, ditch fork

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>