Replace string GNU Triples with llvm::Triple in MCSubtargetInfo and create*MCSubtargetInfo(). NFC.

Summary:
This continues the patch series to eliminate StringRef forms of GNU triples
from the internals of LLVM that began in r239036.

Reviewers: rafael

Reviewed By: rafael

Subscribers: rafael, ted, jfb, llvm-commits, rengolin, jholewinski

Differential Revision: http://reviews.llvm.org/D10311

llvm-svn: 239467
diff --git a/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZMCTargetDesc.cpp b/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZMCTargetDesc.cpp
index 92681cf..8188210 100644
--- a/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZMCTargetDesc.cpp
+++ b/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZMCTargetDesc.cpp
@@ -154,9 +154,8 @@
   return X;
 }
 
-static MCSubtargetInfo *createSystemZMCSubtargetInfo(StringRef TT,
-                                                     StringRef CPU,
-                                                     StringRef FS) {
+static MCSubtargetInfo *
+createSystemZMCSubtargetInfo(const Triple &TT, StringRef CPU, StringRef FS) {
   MCSubtargetInfo *X = new MCSubtargetInfo();
   InitSystemZMCSubtargetInfo(X, TT, CPU, FS);
   return X;