[yocto] [PATCH][meta] Jethro issue with non-normalized paths in BBLAYERS during populate_sdk_ext

[Laurent Gauthier]

    Issue with non-normalized paths in BBLAYERS during populate_sdk_ext
    
    This one-liner applies to Yocto Jethro and fixes a failure of
    populate_sdk_ext when copying bitbake and the layers.
    
    This failure occurs when your BBLAYERS variable contains things
    such as the following:
    
      BBLAYERS ?= " \
        ${TOPDIR}/../meta \
        ${TOPDIR}/../meta-yocto \
        ${TOPDIR}/../meta-yocto-bsp \
        "
    
    Signed-off-by: Laurent Gauthier <laurent.gauthier at soccasys.com>

diff --git a/meta/lib/oe/copy_buildsystem.py b/meta/lib/oe/copy_buildsystem.py
index c0e7541..b2f437e 100644
--- a/meta/lib/oe/copy_buildsystem.py
+++ b/meta/lib/oe/copy_buildsystem.py
@@ -35,6 +35,7 @@ class BuildSystem(object):
         corebase_files.append(bitbake_dir)
 
         for layer in layers:
+            layer = os.path.abspath(layer)
             layerconf = os.path.join(layer, 'conf', 'layer.conf')
             if os.path.exists(layerconf):
                 with open(layerconf, 'r') as f: