[lld] [PAC][lld][AArch64][ELF] Support signed GOT (PR #96169)

[Fangrui Song via llvm-commits]

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@@ -655,6 +655,10 @@ void GotSection::addConstant(const Relocation &r) { relocations.push_back(r); }
 void GotSection::addEntry(const Symbol &sym) {
   assert(sym.auxIdx == symAux.size() - 1);
   symAux.back().gotIdx = numEntries++;
+  if (sym.hasFlag(NEEDS_GOT_AUTH)) {
+    assert(config->emachine == EM_AARCH64);
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MaskRay wrote:

This assert and the above assert are not useful.

https://github.com/llvm/llvm-project/pull/96169