layerman: update meta-ros

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
layerman: update meta-ros

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
layerman: switch meta-browser to angstrom-staging-yocto1.3

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
layers.txt: switch meta-linaro to angstrom branch
layers.txt: fix meta-browser URI

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
Merge remote-tracking branch 'origin/angstrom-v2012.12-yocto1.3'