[llvm] [DebugInfo][DWARF] Set is_stmt on first non-line-0 instruction in BB (PR #105524)

[Paul T Robinson via llvm-commits]

https://github.com/pogo59 commented:

I like this. I should have considered BB transitions when I did the line-0 accommodation in the first place. See question about the new test.

https://github.com/llvm/llvm-project/pull/105524