CHROMIUM: Check #line directives for validity

A #line that has the wrong line can break coverage reports quite badly,
and is easy to fix. Catch those in preupload.

BUG=None
TEST=None

Cq-Depend: chromium:5584720
Change-Id: I9e8558ae84cd14377a76430ed88db715e8f190fa
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/zephyr/+/5585345
Reviewed-by: Tristan Honscheid <honscheid@google.com>
Commit-Queue: Jeremy Bettis <jbettis@chromium.org>
Tested-by: Jeremy Bettis <jbettis@chromium.org>

PRESUBMIT.cfg

@@ -5,3 +5,4 @@ tab_check=false
 [Hook Overrides Options]
 
 [Hook Scripts]
+check_lines = ../../../platform/ec/util/check_line_directives.py --commit ${PRESUBMIT_COMMIT}