[llvm] [BOLT] Ensure remember and restore CFIs are in the same list (PR #144348)

[Paschalis Mpeis via llvm-commits]

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@@ -1663,7 +1663,8 @@ class BinaryFunction {
       Offset = I->first;
     }
     assert(I->first == Offset && "CFI pointing to unknown instruction");
-    if (I == Instructions.begin()) {
+    if (I == Instructions.begin() &&
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paschalis-mpeis wrote:

nit: maybe worth adding a comment that we put this CFI in the `FrameInstructions` instead, so we can properly populate `StateStack` ?

https://github.com/llvm/llvm-project/pull/144348