Retain DoubleAlign

Author: Prabhuk

clang/lib/Basic/Targets/X86.h

@@ -842,7 +842,7 @@ class LLVM_LIBRARY_VISIBILITY UEFIX86_64TargetInfo
     // Windows target in the future.
     this->TheCXXABI.set(TargetCXXABI::Microsoft);
     LongWidth = LongAlign = 32;
-    LongLongAlign = 64;
+    DoubleAlign = LongLongAlign = 64;
     LongDoubleWidth = LongDoubleAlign = 64;
     LongDoubleFormat = &llvm::APFloat::IEEEdouble();
     IntMaxType = SignedLongLong;