Exclude external/github.com/rust-lang/rust

external/github.com/rust-lang/rust is a mirror of upstream rust which
has scanner coverage elsewhere.

BUG=b:286400008
TEST=cros format security_scanning.textproto

Change-Id: I9b6aa55fa16187b16c09ce92a5394b5cce0b5943
Reviewed-on: https://chromium-review.googlesource.com/c/All-Projects/+/4771180
Reviewed-by: Mike Frysinger <[email protected]>
1 file changed