Disable -Wtautological-bitwise-compare in tip-of-tree Clang builds

until it can be cleaned up.

TBR=inglorion

Bug: 1024203
Change-Id: I8c323ee83f9cc6fb2477a980be19e1d35303d6f5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1912714Reviewed-by: Hans Wennborg <hans@chromium.org>
Commit-Queue: Hans Wennborg <hans@chromium.org>
Cr-Commit-Position: refs/heads/master@{#714907}

build/config/compiler/BUILD.gn

@@ -1547,6 +1547,9 @@ config("default_warnings") {
 
             # TODO(https://crbug.com/1016945) Clean up, enable.
             "-Wno-builtin-assume-aligned-alignment",
+
+            # TODO(https://crbug.com/1024203) Clean up, enable.
+            "-Wno-tautological-bitwise-compare",
           ]
         }
       }