[llvm] [PAC][CodeGen][ELF][AArch64] Support signed GOT (PR #105798)

[Daniil Kovalev via llvm-commits]

kovdan01 wrote:

> Comparing to original PR #96164, this one has a couple of differences:

One new difference proposed with latest PR update - do not rely on bitmask pauthabi version value to determine if codegen needs to use signed GOT. It's specific to llvm_linux platform. Instead, check if module flag "ptrauth-elf-got" is present and equal to 1.


https://github.com/llvm/llvm-project/pull/105798