Add noOverride64GlobalCflags support to Soong

Bug: b/261642850
Test: Build and check warnings. Add two xfail tests in bionic and see the
results locally.

Change-Id: I68fca0084787c329b6c49ce4dff6fd132f820735
diff --git a/cc/builder.go b/cc/builder.go
index 0629406..fef00d4 100644
--- a/cc/builder.go
+++ b/cc/builder.go
@@ -519,6 +519,13 @@
 	cppflags += " ${config.NoOverrideGlobalCflags}"
 	toolingCppflags += " ${config.NoOverrideGlobalCflags}"
 
+	if flags.toolchain.Is64Bit() {
+		cflags += " ${config.NoOverride64GlobalCflags}"
+		toolingCflags += " ${config.NoOverride64GlobalCflags}"
+		cppflags += " ${config.NoOverride64GlobalCflags}"
+		toolingCppflags += " ${config.NoOverride64GlobalCflags}"
+	}
+
 	modulePath := android.PathForModuleSrc(ctx).String()
 	if android.IsThirdPartyPath(modulePath) {
 		cflags += " ${config.NoOverrideExternalGlobalCflags}"