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/MSP430/MSP430Subtarget.cpp b/llvm/lib/Target/MSP430/MSP430Subtarget.cpp
index 3dda3bf..6374f41 100644
--- a/llvm/lib/Target/MSP430/MSP430Subtarget.cpp
+++ b/llvm/lib/Target/MSP430/MSP430Subtarget.cpp
@@ -31,7 +31,7 @@
   return *this;
 }
 
-MSP430Subtarget::MSP430Subtarget(const std::string &TT, const std::string &CPU,
+MSP430Subtarget::MSP430Subtarget(const Triple &TT, const std::string &CPU,
                                  const std::string &FS, const TargetMachine &TM)
     : MSP430GenSubtargetInfo(TT, CPU, FS), FrameLowering(),
       InstrInfo(initializeSubtargetDependencies(CPU, FS)), TLInfo(TM, *this),