kernelsrc.bbclass: Fix externalsrc support
When the externalsrc class is used the tasks listed in
SRCTREECOVEREDTASKS are deleted to prevent them being executed. If
externalsrc is used for the kernel then this will include
virtual/kernel:do_patch.
We can depend on do_shared_workdir instead as this will survive when
externalsrc is used.
Signed-off-by: Paul Barker <pbarker@konsulko.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit
2c17d35cc7b9c5e01fd5829858d2f0234e7ac8d6)
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>
