[llvm] [BOLT][Linux] Support ORC for alternative instructions (PR #96709)

[Davide Italiano via llvm-commits]

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@@ -313,6 +310,9 @@ class LinuxKernelRewriter final : public MetadataRewriter {
     if (Error E = readAltInstructions())
       return E;
 
+    if (Error E = readORCTables())
+      return E;
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dcci wrote:

we might want to add a comment here explaining why there's this order, i.e. we first have to read `.parainstruction` and `.altrinstruction` as they're a dependency for ORC

https://github.com/llvm/llvm-project/pull/96709