Checking for stack canaries in `check-security` is disabled for Rust executables
(Rust does support `-Z stack-protector=all` but only for the nightly compiler).
Signed-off-by: Daira Hopwood <daira@jacaranda.org>
This fixes the way arguments were passed to security-check, and also
a typo in how BIND_NOW was being searched for in a list.
Also fix how symbol-check is invoked although that script isn't
currently used.