[compiler-rt] [llvm] [llvm-profdata] Add block percent to detailed summary (PR #105915)

[antoine moynault via llvm-commits]

antmox wrote:

Also broke clang-arm64-windows-msvc : https://lab.llvm.org/buildbot/#/builders/161/builds/4261

https://github.com/llvm/llvm-project/pull/105915