Merge "[rust] Update clang version used for bindgen"

	defaultBindgenFlags = []string{""}

	// bindgen should specify its own Clang revision so updating Clang isn't potentially blocked on bindgen failures.

	bindgenClangVersion = "clang-r412851"

	bindgenClangVersion = "clang-r416183b"

	_ = pctx.VariableFunc("bindgenClangVersion", func(ctx android.PackageVarContext) string {

		if override := ctx.Config().Getenv("LLVM_BINDGEN_PREBUILTS_VERSION"); override != "" {