[lld] [LLD][COFF] Add basic ARM64X dynamic relocations support (PR #118035)

[Jacek Caban via llvm-commits]

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+// REQUIRES: aarch64
+// RUN: split-file %s %t.dir && cd %t.dir
+
+// RUN: llvm-mc -filetype=obj -triple=aarch64-windows test.s -o test.obj
+// RUN: llvm-mc -filetype=obj -triple=aarch64-windows loadconfig.s -o loadconfig.obj
+// RUN: llvm-mc -filetype=obj -triple=aarch64-windows loadconfig-short.s -o loadconfig-short.obj
+
+// RUN: lld-link -machine:arm64x -out:out.dll -dll -noentry loadconfig.obj test.obj
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cjacek wrote:

Yes, I think that's the simplest possible ARM64X relocs test (and testing more complex cases will require namespaces).

https://github.com/llvm/llvm-project/pull/118035