cgroups: introduce CGROUPS_FSTAB variable
cgroups: introduce CGROUPS_FSTAB variable

If fstab should be populated with a cgroups entry, set this value to
"1". LXC and Docker have competing views of cgroups and how the
hierarchy should be mounted, and hence the decision is sometimes better
left to the init sequence (versus fstab).

Signed-off-by: Bruce Ashfield <284cc737d174a260eec2a2a6324a304f84b1ae0f@windriver.com>

OverC/meta-overc,mufeng/meta-overc,masselstine/meta-overc,masselstine/meta-overc,jwessel/meta-overc,jwessel/meta-overc,OverC/meta-overc,WindRiver-OpenSourceLabs/meta-overc,mufeng/meta-overc,paw3142/meta-overc-1,jwessel/meta-overc,masselstine/meta-overc,masselstine/meta-overc,WindRiver-OpenSourceLabs/meta-overc,WindRiver-OpenSourceLabs/meta-overc,OverC/meta-overc,OverC/meta-overc,mufeng/meta-overc,paw3142/meta-overc-1,OverC/meta-overc,OverC/meta-overc