devtool: warn user about multiple layer having the same base name
Currently `devtool finish RECIPE meta' will silently succeed even
if there are multiple layers having the same base name of 'meta'.
e.g. meta layer from oe-core and meta layer from meta-secure-core.
We should at least give user a warning in such case. With the patch,
we will get warning like below.
WARNING: Multiple layers have the same base name 'meta', use the first one '<PROJ_DIR>/oe-core/meta'.
WARNING: Consider using path instead of base name to specify layer:
<PROJ_DIR>/oe-core/meta
<PROJ_DIR>/meta-secure-core/meta
Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
