toaster: bin/toaster whitelist TOASTER_DIR
Some of the tinfoil2 changes resulted in TOASTER_DIR being cleared by
the memory resident bitbake server toaster starts up. This prevented
toaster from being able to connect to its sqlite database. Adding
TOASTER_DIR to the BB_ENV_EXTRAWHITE list stops the cooker from clearing
out the TOASTER_DIR variable.
[YOCTO #9252]
Signed-off-by: brian avery <brian.avery@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>