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

[Fangrui Song via llvm-commits]

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+// REQUIRES: aarch64
+// RUN: rm -rf %t && split-file %s %t && cd %t
+// RUN: llvm-mc -filetype=obj -triple=aarch64 asm -o a.o
+// RUN: ld.lld --threads=1 --shared --script=lds a.o -o out.so --defsym absolute=0xf0000000
+// RUN: llvm-objdump -d --no-show-raw-insn out.so | FileCheck %s
+// RUN: llvm-objdump -d --no-show-raw-insn out.so | FileCheck %s --check-prefix=CHECK-PADS
+// RUN: llvm-mc -filetype=obj -triple=aarch64 shared -o shared.o
+// RUN: ld.lld --shared -o shared.so shared.o --soname=shared.so
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MaskRay wrote:

`--soname=` could be omitted as we are using relative paths

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