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

[Vitaly Buka via llvm-commits]

vitalybuka wrote:

Looks like from this patch https://lab.llvm.org/buildbot/#/builders/107/builds/7329

CC @thurstond 

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