fuzzers: Disable clang warning for clang 12

Fixes build when using clang 12

Change-Id: Ia60e8690e0b6dbe7c33879dfdf1b41bfcf71f6f6
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/57884
Auto-Submit: Ben Clayton <bclayton@google.com>
Commit-Queue: James Price <jrprice@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: James Price <jrprice@google.com>
diff --git a/fuzzers/tint_ast_fuzzer/protobufs/tint_ast_fuzzer.h b/fuzzers/tint_ast_fuzzer/protobufs/tint_ast_fuzzer.h
index 9439ed3..b4879f3 100644
--- a/fuzzers/tint_ast_fuzzer/protobufs/tint_ast_fuzzer.h
+++ b/fuzzers/tint_ast_fuzzer/protobufs/tint_ast_fuzzer.h
@@ -25,6 +25,7 @@
 #pragma clang diagnostic ignored "-Wextra-semi-stmt"
 #pragma clang diagnostic ignored "-Winconsistent-missing-destructor-override"
 #pragma clang diagnostic ignored "-Wweak-vtables"
+#pragma clang diagnostic ignored "-Wsuggest-destructor-override"
 
 #include "fuzzers/tint_ast_fuzzer/protobufs/tint_ast_fuzzer.pb.h"