Updated VC++ build system

llvm-svn: 43123
diff --git a/llvm/win32/Support/Support.vcproj b/llvm/win32/Support/Support.vcproj
index 5f7c4dc..364fbf8 100644
--- a/llvm/win32/Support/Support.vcproj
+++ b/llvm/win32/Support/Support.vcproj
@@ -276,6 +276,10 @@
 				>
 			</File>
 			<File
+				RelativePath="..\..\include\llvm\Support\AlignOf.h"
+				>
+			</File>
+			<File
 				RelativePath="..\..\include\llvm\Support\Allocator.h"
 				>
 			</File>