Turns off the shared cache. It isn't a significant factor in performance
(now that WAL is enabled), and is a really bad idea to have enabled in
processes that fork() (as bitbake it prone to do).
[YOCTO #13030]
(Bitbake rev: 71b427bf01374973a971c10cb64024c8ef2a11eb)
Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>