[lld] [LLD] [ELF] Add support for linker script unary plus operator (PR #121508)

[Fangrui Song via llvm-commits]

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@@ -73,6 +73,7 @@ SECTIONS {
   log2ceil100000000 = LOG2CEIL(0x100000000);
   log2ceil100000001 = LOG2CEIL(0x100000001);
   log2ceilmax = LOG2CEIL(0xffffffffffffffff);
+  unaryadd = +3 + ++5;
 }
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MaskRay wrote:

perhaps also add ` -+5` while here...

https://github.com/llvm/llvm-project/pull/121508