[llvm] [BOLT] Model emitted code sections in LongJmp layout (PR #218232)

[Adam Bzowski via llvm-commits]

adam-bzowski-arm wrote:

[LongJmp.coverage.txt](https://github.com/user-attachments/files/31347937/LongJmp.coverage.txt)
The coverage report of bolt/lib/Passes/LongJmp.cpp over the 13 LIT tests in bolt/test/AArch64/LongJmp-Layout/*. The relevant lines are 319-787 (from LongJmpPass::updateSectionAlignment to LongJmpPass::layout including).

https://github.com/llvm/llvm-project/pull/218232