Krasimir Georgiev 6ddf9128b2 llvm-wrapper: update for LLVM API change
No functional changes intended.

Adds an include for llvm::SmallString. Previously, this must have been
implicitly provided by some of the existing headers. With recent LLVM
changes, not anymore:
https://buildkite.com/llvm-project/rust-llvm-integrate-prototype/builds/20776#01895448-44a4-4a1e-8407-9d41d0186132/209-690
2023-07-14 12:10:29 +00:00
..
2023-04-04 17:05:08 +08:00