tests: relocate state file to actual /var

Since /var has moved to the encrypted partition, use the real system
mount location for /var so it doesn't matter which filesystem it is bind
mounted to.

BUG=None
TEST=link build, tests pass

Change-Id: I2831949f3c1cf71765d97720b5ca64b869ec1fa4
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/28033
Reviewed-by: Luigi Semenzato <semenzato@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
1 file changed