Make torque run fine in CFI builds with -std=c++17

It's not yet understood how this worked with c++14. Add the workaround,
so that we can figure this out in parallel with -std=c++17 enablement.

Bug: chromium:1273966
Change-Id: I7098d345a5df6e208dfd582eeaecab22e52fecb9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3304143
Auto-Submit: Nico Weber <thakis@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Commit-Queue: Hannes Payer <hpayer@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78135}

src/torque/earley-parser.cc

@@ -279,6 +279,7 @@ const Item* RunEarleyAlgorithm(
 }
 
 // static
+DISABLE_CFI_ICALL
 bool Grammar::MatchChar(int (*char_class)(int), InputPosition* pos) {
   if (**pos && char_class(static_cast<unsigned char>(**pos))) {
     ++*pos;