[fuzzilli] Exit with non-zero value on OOM

Exit with a non-zero exit code on OOM crashes such that Fuzzilli can discard
these samples. Otherwise Fuzzilli treats these as valid samples and adds them
to the corpus.

Bug: v8:10571
Change-Id: Ia450a86288d9c2e8ee1cf0eb57bd8808de2f7dd7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3816665Reviewed-by: Samuel Groß <saelo@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Carl Smith <cffsmith@google.com>
Cr-Commit-Position: refs/heads/main@{#82311}

src/api/api.cc

@@ -343,7 +343,9 @@ void Utils::ReportOOMFailure(i::Isolate* i_isolate, const char* location,
                            details.is_heap_oom ? "javascript" : "process",
                            location);
 #ifdef V8_FUZZILLI
-      exit(0);
+      // Ignore OOM crashes for fuzzing but exit with an error such that
+      // samples are discarded by Fuzzilli.
+      exit(1);
 #else
       base::OS::Abort();
 #endif  // V8_FUZZILLI