Fix build issue in openmp

Author: ronlieb

offload/plugins-nextgen/common/src/JIT.cpp

@@ -115,7 +115,7 @@ createTargetMachine(Module &M, std::string CPU, unsigned OptLevel) {
   TargetOptions Options = codegen::InitTargetOptionsFromCodeGenFlags(TT);
 
   std::unique_ptr<TargetMachine> TM(T->createTargetMachine(
-      M.getTargetTriple().str(), CPU, Features.getString(), Options, RelocModel,
+      M.getTargetTriple(), CPU, Features.getString(), Options, RelocModel,
       CodeModel, CGOptLevel));
   if (!TM)
     return make_error<StringError>("Failed to create target machine",