[libunwind] [libunwind] Call `__arm_za_disable` before entering EH (PR #160905)

[Oliver Hunt via cfe-commits]

================
@@ -1971,6 +1975,32 @@ Registers_arm64::operator=(const Registers_arm64 &other) {
   return *this;
 }
 
+void Registers_arm64::jumpto() {
----------------
ojhunt wrote:

I believe that this should be `inline` for correct linkage

https://github.com/llvm/llvm-project/pull/160905