[yocto] [meta-mono][PATCH] layer.conf: Use .= for adding to BBPATH and += to BBFILES

[Khem Raj]

Fixes parsing errors which is appearing after this commit to
meta-openembedded

http://cgit.openembedded.org/meta-openembedded/commit/?id=3c21a46020bd0816579648f

This triggers
exception NameError: name 'base_contains' is not defined
without this change

Signed-off-by: Khem Raj <raj.khem at gmail.com>
---
 conf/layer.conf |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/conf/layer.conf b/conf/layer.conf
index 6bcf70e..d8cc797 100644
--- a/conf/layer.conf
+++ b/conf/layer.conf
@@ -1,8 +1,8 @@
 # We have a conf and classes directory, add to BBPATH
-BBPATH := "${BBPATH}:${LAYERDIR}"
+BBPATH .= ":${LAYERDIR}"
 
 # We have a recipes directory, add to BBFILES
-BBFILES := "${BBFILES} ${LAYERDIR}/recipes-mono/*/*.bb \
+BBFILES += "${LAYERDIR}/recipes-mono/*/*.bb \
             ${LAYERDIR}/recipes-mono/*/*.bbappend"
 
 BBFILE_COLLECTIONS += "mono"
-- 
1.7.9.5