Make clang-format use C++03 syntax

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@300387 91177308-0d34-0410-b5e6-96231b3b80d8

.clang-format

@@ -2,6 +2,7 @@ BasedOnStyle: LLVM
 
 ---
 Language: Cpp
+Standard: Cpp03
 
 AlwaysBreakTemplateDeclarations: true
 PointerAlignment: Left