Standardize accesses to the TargetInfo in IR-gen.

Patch by Stephen Lin!

llvm-svn: 179638
diff --git a/clang/lib/CodeGen/CGDecl.cpp b/clang/lib/CodeGen/CGDecl.cpp
index 173ca6c..9ad9cf0 100644
--- a/clang/lib/CodeGen/CGDecl.cpp
+++ b/clang/lib/CodeGen/CGDecl.cpp
@@ -900,7 +900,7 @@
       CharUnits allocaAlignment = alignment;
       if (isByRef)
         allocaAlignment = std::max(allocaAlignment,
-            getContext().toCharUnitsFromBits(Target.getPointerAlign(0)));
+            getContext().toCharUnitsFromBits(getTarget().getPointerAlign(0)));
       Alloc->setAlignment(allocaAlignment.getQuantity());
       DeclPtr = Alloc;