[lld] [lld][ELF] Extend profile guided function ordering to ELF binaries (PR #117514)

[Fangrui Song via llvm-commits]

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@@ -141,6 +141,20 @@ def call_graph_profile_sort: JJ<"call-graph-profile-sort=">,
 def : FF<"no-call-graph-profile-sort">, Alias<call_graph_profile_sort>, AliasArgs<["none"]>,
   Flags<[HelpHidden]>;
 
+defm irpgo_profile_sort: Eq<"irpgo-profile-sort",
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MaskRay wrote:

Ideally implement the change for Mach-O in a prerequisite patch, then implement it in this PR as a follow-up

guideline: improve the base, then port the base 

https://github.com/llvm/llvm-project/pull/117514