[lld] [LLD][ELF][AArch64] Add BTI Aware long branch thunks (PR #108989)

[Fangrui Song via llvm-commits]

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@@ -28,6 +28,39 @@ uint64_t elf::getAArch64Page(uint64_t expr) {
   return expr & ~static_cast<uint64_t>(0xFFF);
 }
 
+// A BTI landing pad is a valid target for an indirect branch
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MaskRay wrote:

reflow the comment after adopting 80-column wrap? 

https://github.com/llvm/llvm-project/pull/108989