multilib: Avoid sysroot race issues when multilib enabled

Multilib changes RECIPE_SYSROOT which can make the value in PSEUDO_IGNORE_PATHS
incorrect. Add the correct value, which fixes races over files in the sysroot.

[YOCTO #14581]

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 64003e5e)
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>