Remove LLVMExtSetCurrentDebugLocation from llvm_ext.cc for LLVM 9+
#9749
| Job | Run time |
|---|---|
| 6m 4s | |
| 4m 42s | |
| 12m 45s | |
| 46m 16s | |
| 2h 16m 8s | |
| 10m 27s | |
| 3h 36m 22s |