RUN: rm -rf %t
RUN: mkdir %t
RUN: cd %t
RUN: cp %p/../Inputs/search_dwos/a.dwo a.dwo
RUN: cp %p/../Inputs/search_dwos/b.dwo b.dwo
RUN: cp %p/../Inputs/search_dwos/main main
RUN: llvm-dwp -e main -o %t.dwp 

Search the DWO from relative path if absolute path is not valid.
Build commands for the test binaries:

clang++ -Xclang -fdebug-compilation-dir -Xclang "path-not-exists" -g -O0 -gsplit-dwarf a.cpp b.cpp -o main

sources:
a.cpp:
  void a() {}

b.cpp:
  void b() {}
  int main() {
     return 0;
  }