Correctly align large arrays in x86-64. This fixes PR5599.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@105500 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp
index 255c71d..82c6507 100644
--- a/lib/Basic/Targets.cpp
+++ b/lib/Basic/Targets.cpp
@@ -1278,6 +1278,8 @@
     LongWidth = LongAlign = PointerWidth = PointerAlign = 64;
     LongDoubleWidth = 128;
     LongDoubleAlign = 128;
+    LargeArrayMinWidth = 128;
+    LargeArrayAlign = 128;
     IntMaxType = SignedLong;
     UIntMaxType = UnsignedLong;
     Int64Type = SignedLong;