cml1: fix tasks after default [dirs] changed

These tasks relied upon [dirs] being ${B} by default.  As the functions are not
simple, add back [dirs] so they work again.

[ YOCTO #10027 ]

(From OE-Core rev: 614d976ee97d6386c37afb54add5b83741ca401e)

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/cml1.bbclass

@@ -42,6 +42,7 @@ python do_menuconfig() {
 }
 do_menuconfig[depends] += "ncurses-native:do_populate_sysroot"
 do_menuconfig[nostamp] = "1"
+do_menuconfig[dirs] = "${B}"
 addtask menuconfig after do_configure
 
 python do_diffconfig() {
@@ -73,4 +74,5 @@ python do_diffconfig() {
 }
 
 do_diffconfig[nostamp] = "1"
+do_diffconfig[dirs] = "${B}"
 addtask diffconfig