Update clang/test/Lexer/defer-keyword.cpp

Co-authored-by: Aaron Ballman <[email protected]>

Author: Sirraide

clang/test/Lexer/defer-keyword.cpp

@@ -2,4 +2,4 @@
 // RUN: %clang_cc1 -fsyntax-only -verify -fdefer-ts %s
 
 // expected-no-diagnostics
-int defer;
+int _Defer;