bitbake: bitbake-config-build: add an alias to bitbake-layers

This alias is intended for managing specific local configs and it
is prompted by adding support for config fragments (in a separate
commit to oe-core); after some deliberation I concluded there should be
a separate tool, as bitbake-layers is already somewhat over-stuffed,
and this will give space for more build/conf/* operations in the future
that anyone can come up with (such as tweaking site-specific items
in site.conf etc.)

The alias completely reuses existing code via symlink and
the difference is in where it looks for plugins.

(Bitbake rev: ba90fe673aa87cb0cda9b2e465ebe2063551f527)

Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/bin/bitbake-config-build

@@ -0,0 +1 @@
+bitbake-layers

bitbake/bin/bitbake-layers

@@ -18,13 +18,14 @@ import warnings
 warnings.simplefilter("default")
 
 bindir = os.path.dirname(__file__)
+toolname = os.path.basename(__file__).split(".")[0]
 topdir = os.path.dirname(bindir)
 sys.path[0:0] = [os.path.join(topdir, 'lib')]
 
 import bb.tinfoil
 import bb.msg
 
-logger = bb.msg.logger_create('bitbake-layers', sys.stdout)
+logger = bb.msg.logger_create(toolname, sys.stdout)
 
 def main():
     parser = argparse.ArgumentParser(
@@ -67,7 +68,8 @@ def main():
             bbpaths = tinfoil.config_data.getVar('BBPATH').split(':')
 
         for path in ([topdir] + bbpaths):
-            pluginpath = os.path.join(path, 'lib', 'bblayers')
+            pluginbasepath = {"bitbake-layers":'bblayers', 'bitbake-config-build':'bbconfigbuild'}[toolname]
+            pluginpath = os.path.join(path, 'lib', pluginbasepath)
             bb.utils.load_plugins(logger, plugins, pluginpath)
 
         registered = False