Allow binary_asm_labels in the aarch64 module

LLVM only flags these as problematic on x86, but Rust has started
flagging them on all platforms. We shouldn't need to worry about
anything here.

Author: tgross35

src/aarch64_linux.rs

@@ -23,6 +23,7 @@
 //! The original `lse.S` has some truly horrifying code that expects to be compiled multiple times with different constants.
 //! We do something similar, but with macro arguments.
 #![cfg_attr(feature = "c", allow(unused_macros))] // avoid putting the macros into a submodule
+#![allow(binary_asm_labels)] // `0:` and `1:` labels are not a problem on Arm
 
 // We don't do runtime dispatch so we don't have to worry about the `__aarch64_have_lse_atomics` global ctor.