Suppress two override suggestion warnings.

We're turning these on in ANGLE and want to keep the build clean.
diff --git a/BUILD.gn b/BUILD.gn
index 9525b5d..9a6c1bc 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -59,13 +59,13 @@
     script,
     template_file,
   ]
-  outputs = [
-    out_file
-  ]
+  outputs = [ out_file ]
   args = [
     rebase_path(src_dir, root_build_dir),
-    "-i", rebase_path(template_file, root_build_dir),
-    "-o", rebase_path(out_file, root_build_dir),
+    "-i",
+    rebase_path(template_file, root_build_dir),
+    "-o",
+    rebase_path(out_file, root_build_dir),
   ]
 }
 
@@ -228,10 +228,12 @@
         "-Wno-ignored-qualifiers",
         "-Wno-implicit-fallthrough",
         "-Wno-inconsistent-missing-override",
-        "-Wno-sign-compare",
-        "-Wno-unused-variable",
         "-Wno-missing-field-initializers",
         "-Wno-newline-eof",
+        "-Wno-sign-compare",
+        "-Wno-suggest-destructor-override",
+        "-Wno-suggest-override",
+        "-Wno-unused-variable",
       ]
     }
     if (is_win && !is_clang) {
@@ -291,9 +293,9 @@
   }
   defines = [ "ENABLE_OPT=1" ]
   deps = [
+    ":glslang_build_info",
     ":glslang_default_resource_limits_sources",
     ":glslang_sources",
-    ":glslang_build_info",
   ]
   public_configs = [ ":glslang_hlsl" ]