[llvm] [BOLT] Fix label in epilogue-determination.s test (PR #174960)

[Paschalis Mpeis via llvm-commits]

paschalis-mpeis wrote:

@yozhu Hey YongKang,

Was this a typo or was it intentional?
We get a failure in some of our internal CIs.

https://github.com/llvm/llvm-project/pull/174960