[llvm] [DebugInfo] Don't set prologue_end behind line-zero call insts (PR #156850)

[Jeremy Morse via llvm-commits]

jmorse wrote:

> I don't feel /super/ strongly about this.

Aha... I uh, don't either, and I reckon that what we have right now is sufficiently good. Without objection, I'll just land it as is (using the containing functions scope-line, rather than the inline scope).

https://github.com/llvm/llvm-project/pull/156850