bitbake: bin/bitbake: Create bitbake_main API

Moved most of functionality of bin/bitbake to lib/bb/main.py
to be able to call bitbake from python code.

(Bitbake rev: d377f7f88d73f4e5d2dffef03d6acee809827ac6)

Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/tinfoil.py

@@ -90,7 +90,7 @@ class TinfoilConfigParameters(ConfigParameters):
         self.initial_options = options
         super(TinfoilConfigParameters, self).__init__()
 
-    def parseCommandLine(self):
+    def parseCommandLine(self, argv=sys.argv):
         class DummyOptions:
             def __init__(self, initial_options):
                 for key, val in initial_options.items():