dsymutil: Make -oso-prepend-path available to DwarfLinker.

NFC

llvm-svn: 248312

llvm/tools/dsymutil/dsymutil.cpp

@@ -257,6 +257,7 @@ int main(int argc, char **argv) {
   Options.Verbose = Verbose;
   Options.NoOutput = NoOutput;
   Options.NoODR = NoODR;
+  Options.PrependPath = OsoPrependPath;
 
   llvm::InitializeAllTargetInfos();
   llvm::InitializeAllTargetMCs();

llvm/tools/dsymutil/dsymutil.h

@@ -28,6 +28,7 @@ struct LinkOptions {
   bool Verbose;  ///< Verbosity
   bool NoOutput; ///< Skip emitting output
   bool NoODR;    ///< Do not unique types according to ODR
+  std::string PrependPath; //< -oso-prepend-path
 
   LinkOptions() : Verbose(false), NoOutput(false) {}
 };