boring-sys: Blocklist max_align_t in bindgen

https://github.com/rust-lang/rust-bindgen/issues/1823

boring-sys/build/main.rs

@@ -676,6 +676,7 @@ fn main() {
         .size_t_is_usize(true)
         .layout_tests(true)
         .prepend_enum_name(true)
+        .blocklist_type("max_align_t") // Not supported by bindgen on all targets, not used by BoringSSL
         .clang_args(get_extra_clang_args_for_bindgen(&config))
         .clang_arg("-I")
         .clang_arg(include_path.display().to_string());