llvm-project

246fa9a9 - Revert gsymutil changes due to concurrency problems (#142829)

Revert gsymutil changes due to concurrency problems (#142829) We saw occasional segfaults while processing some binaries. The reason probably is that we may clear the DIE while we are reading it's data from another thread which happens due to cross-unit references. --------- Co-authored-by: Arslan Khabutdinov <akhabutdinov@fb.com>