init.sh: Always create xbmklocal

If we're in a release work directory, TMPDIR is already
set, so the local ./tmp won't be created, which would
lead to an error.

Fix it by creating xbmklocal before checking TMPDIR.

Signed-off-by: Leah Rowe <leah@libreboot.org>

include/init.sh

@@ -186,6 +186,8 @@ xbmk_git_init()
 
 xbmk_create_tmpdir()
 {
+	x_ mkdir -p "$xbmklocal"
+
 	# unify all temporary files/directories in a single TMPDIR
 	[ -z "${TMPDIR+x}" ] || [ "${TMPDIR%_*}" = "/tmp/xbmk" ] || \
 	    unset TMPDIR