p0012r1: define corresponding feature test macro

llvm-svn: 288452
diff --git a/clang/test/Lexer/cxx-features.cpp b/clang/test/Lexer/cxx-features.cpp
index c25ade3..d38541f 100644
--- a/clang/test/Lexer/cxx-features.cpp
+++ b/clang/test/Lexer/cxx-features.cpp
@@ -34,8 +34,7 @@
 #error "wrong value for __cpp_aligned_new"
 #endif
 
-#if check(noexcept_function_type, 0, 0, 0, 0)
-// FIXME: value shuld be 201510 for cxx1z once implemented
+#if check(noexcept_function_type, 0, 0, 0, 201510)
 #error "wrong value for __cpp_noexcept_function_type"
 #endif