layerman: switch meta-browser to angstrom repo

This fixes hardfp builds

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
Merge remote-tracking branch 'origin/angstrom-v2013.06-yocto1.4'
oebb.sh: test for git 1.8 and fall back to old test if older

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
oebb.sh: pass bitbake error code back to shell

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