CodeGen: simplify the logic a slight bit

Move the definition of `getTriple()` into the header.  It would just call
`getTarget().getTriple()`.  Inline the definition to allow the compiler to see
the same amount of the layout as previously.  Remove the more verbose
`getTarget().getTriple()` in favour of `getTriple()`.

llvm-svn: 281487
diff --git a/clang/lib/CodeGen/CodeGenModule.h b/clang/lib/CodeGen/CodeGenModule.h
index a069ce1..c19e5bc 100644
--- a/clang/lib/CodeGen/CodeGenModule.h
+++ b/clang/lib/CodeGen/CodeGenModule.h
@@ -614,7 +614,7 @@
     return TheModule.getDataLayout();
   }
   const TargetInfo &getTarget() const { return Target; }
-  const llvm::Triple &getTriple() const;
+  const llvm::Triple &getTriple() const { return Target.getTriple(); }
   bool supportsCOMDAT() const;
   void maybeSetTrivialComdat(const Decl &D, llvm::GlobalObject &GO);