[clang] [clang-repl] Fixing vulnerabilities with respect to orc runtime (PR #165852)

[Anutosh Bhat via cfe-commits]

anutosh491 wrote:

The latest commit respects both paths 

1) checks existence for atleast one 
2) Then through a lambda function which is run through both the paths we check for the runtimes existence
3) if nothing is sound, we have a summary of locations we traversed that if returned along the error msg.

https://github.com/llvm/llvm-project/pull/165852