util/lint: Update non-ascii linter for FreeBSD

On FreeBSD, this test was failing with the error:
"grep: Argument list too long"

- Remove support for testing coreboot not in a git repo.  Many of
the other linters already don't support this.
- Use git grep to find offending files, then xargs to print out
the lines.

Change-Id: Ic017dc3465fd9a46ff4e6ec5ef16396e963483cd
Signed-off-by: Martin Roth <martinr@coreboot.org>
Reviewed-on: https://review.coreboot.org/c/28448
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

0 files changed, 0 insertions, 0 deletions