The processing of the "do_" prefix to tasks is currently inconsistent
and has resulted in "bitbake world -g" being broken as task prefixes
don't get handled correctly.
Make the "do_" task prefix handling consistent through various codepaths.
[YOCTO #10651]
(Bitbake rev: 3d7186353e804c9410096c408bc337a98c8b33fe)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>