This makes do_configure depend on changes to any cmake file when
externalsrc is active.
(From OE-Core rev: dae2757bf0fea6ae821a28bd6ea9d0232694c177)
Signed-off-by: Peter Kjellerstedt <peter.kjellerstedt@axis.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>