[lld] [lld][ELF] Add armeb support when incoming bc is arm big endian (PR #72604)

[Fangrui Song via llvm-commits]

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@@ -0,0 +1,12 @@
+; REQUIRES: arm
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MaskRay wrote:

You can use `arm.ll`. I added some tests there.

https://github.com/llvm/llvm-project/pull/72604