[OE-core] [PATCH 1/7] bblayers.conf.sample: Use ?= to set BBLAYERS

[Dongxiao Xu]

Hob may dynamically sets BBLAYERS to bitbake server, thus we need a
flexible way to load BBLAYERS value.

Signed-off-by: Dongxiao Xu <dongxiao.xu at intel.com>
---
 meta/conf/bblayers.conf.sample |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/meta/conf/bblayers.conf.sample b/meta/conf/bblayers.conf.sample
index 339a421..222b03a 100644
--- a/meta/conf/bblayers.conf.sample
+++ b/meta/conf/bblayers.conf.sample
@@ -3,6 +3,6 @@
 LCONF_VERSION = "4"
 
 BBFILES ?= ""
-BBLAYERS = " \
+BBLAYERS ?= " \
   ##COREBASE##/meta \
   "
-- 
1.7.0.4