layer.conf: fix parsing with recent change to meta-systemd
layer.conf: fix parsing with recent change to meta-systemd

Fixes parsing errors which is appearing after the following commit:

http://cgit.openembedded.org/meta-openembedded/commit/?id=3c21a46020bd0816579648f684c41dbd6333583e

Without this change, you get "NameError: name 'base_contains' is not
defined".

Based upon a patch by Khem Raj <raj.khem@gmail.com>, the only change
being prepending to BBPATH as was done previously.

Signed-off-by: Paul Eggleton <737d4dae46a541673d7bf4e0d5b32714b16528d8@linux.intel.com>

bluelightning/meta-opie,bluelightning/meta-opie,bluelightning/meta-opie,bluelightning/meta-opie,bluelightning/meta-opie