Standardize accesses to the TargetInfo in IR-gen.

Patch by Stephen Lin!

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@179638 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGDecl.cpp b/lib/CodeGen/CGDecl.cpp
index 173ca6c..9ad9cf0 100644
--- a/lib/CodeGen/CGDecl.cpp
+++ b/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;