Allow target to specify about using minimum alignment vs preferred.  Takes care of 
FIXME: Override "preferred align" for double and long long for ARM apcs-gnu ABI. 
Also part of rdar://9802874

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@135940 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Basic/TargetInfo.cpp b/lib/Basic/TargetInfo.cpp
index 7ea5146..c7a87b2 100644
--- a/lib/Basic/TargetInfo.cpp
+++ b/lib/Basic/TargetInfo.cpp
@@ -65,6 +65,9 @@
   // Default to no types using fpret.
   RealTypeUsesObjCFPRet = 0;
 
+  // Default to using preferred type alignment.
+  UsePreferredTypeAlign = true;
+
   // Default to using the Itanium ABI.
   CXXABI = CXXABI_Itanium;