[llvm] [BOLT][AArch64] Patch functions targeted by optional relocs (PR #138750)

[Paschalis Mpeis via llvm-commits]

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@@ -28,15 +32,21 @@
 _start:
 # FDATA: 0 [unknown] 0 1 _start 0 0 100
   .cfi_startproc
+
+## Check that the code at the orignal location is converted into a veneer/thunk.
+# CHECK-PATCH-LABEL: <_start.org.0>
+# CHECK-PATCH-NEXT: adrp x16
----------------
paschalis-mpeis wrote:

nit: typo

Could also show that the veneer is pointing back to the hot code.

```suggestion
## Check that the code at the original location is converted into a veneer/thunk.
# CHECK-PATCH-LABEL: <_start.org.0>
# CHECK-PATCH-NEXT: adrp x16, {{.*}} <_start>
```

https://github.com/llvm/llvm-project/pull/138750