fuchsia: allow FATAL log messages in tests

* Crashpash has a few DEATH tests that will FATAL

Fixed: fuchsia:77967
Change-Id: Ibea3b338ca7f1497b2f7fd4a9afd5ccac643125d
Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/2937542
Commit-Queue: Francois Rousseau <frousseau@google.com>
Commit-Queue: Scott Graham <scottmg@chromium.org>
Reviewed-by: Scott Graham <scottmg@chromium.org>
GitOrigin-RevId: 21313fad9ae31be97ee0405325ccaef61414e825
diff --git a/BUILD.gn b/BUILD.gn
index 3f19b60..dfa7b1f 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -82,7 +82,7 @@
 
       test_specs = {
         log_settings = {
-          max_severity = "ERROR"
+          max_severity = "FATAL"
         }
       }
     }