Revert r239721 - Replace string GNU Triples with llvm::Triple in InitMCObjectFileInfo. NFC.

It appears to cause sparc-little-endian.s to assert on Windows and Darwin.

llvm-svn: 239724
diff --git a/llvm/tools/dsymutil/DwarfLinker.cpp b/llvm/tools/dsymutil/DwarfLinker.cpp
index 052c1da..7dc15b9 100644
--- a/llvm/tools/dsymutil/DwarfLinker.cpp
+++ b/llvm/tools/dsymutil/DwarfLinker.cpp
@@ -527,7 +527,7 @@
 
   MOFI.reset(new MCObjectFileInfo);
   MC.reset(new MCContext(MAI.get(), MRI.get(), MOFI.get()));
-  MOFI->InitMCObjectFileInfo(TheTriple, Reloc::Default, CodeModel::Default,
+  MOFI->InitMCObjectFileInfo(TripleName, Reloc::Default, CodeModel::Default,
                              *MC);
 
   MAB = TheTarget->createMCAsmBackend(*MRI, TripleName, "");