Disable -Wbitwise-instead-of-logical for llvm-10.0 in swiftshader

Bug: chromium:1255745
Change-Id: I2eccb1d927e50be977aa823895fa50c76b35b398
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/58108
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Kokoro-Result: kokoro <noreply+kokoro@google.com>
Tested-by: Nico Weber <thakis@google.com>
Commit-Queue: Nico Weber <thakis@chromium.org>
diff --git a/third_party/llvm-10.0/BUILD.gn b/third_party/llvm-10.0/BUILD.gn
index bc6116a..80bcf41 100644
--- a/third_party/llvm-10.0/BUILD.gn
+++ b/third_party/llvm-10.0/BUILD.gn
@@ -62,6 +62,7 @@
   if (is_clang) {
     cflags += [
       "-Wno-attributes",
+      "-Wno-bitwise-instead-of-logical",
       "-Wno-deprecated-declarations",
       "-Wno-enum-compare",
       "-Wno-header-hygiene",