[libc++] Turn off clang-format for auto-generated version header. NFC.

GitOrigin-RevId: bcb5a124aea8ecba090ffe2815e357480830d53b
diff --git a/include/version b/include/version
index b13afca..3252219 100644
--- a/include/version
+++ b/include/version
@@ -170,6 +170,8 @@
 #pragma GCC system_header
 #endif
 
+// clang-format off
+
 #if _LIBCPP_STD_VER > 11
 # define __cpp_lib_chrono_udls                          201304L
 # define __cpp_lib_complex_udls                         201309L
@@ -365,4 +367,6 @@
 # define __cpp_lib_string_contains                      202011L
 #endif
 
+// clang-format on
+
 #endif // _LIBCPP_VERSIONH