[libc++] NFC: Normalize `#endif //` comment indentation

GitOrigin-RevId: 4cd6ca102a94e1b64ba3f940cc26b4d7b2b82964
diff --git a/include/stdint.h b/include/stdint.h
index d7b6902..5d64910 100644
--- a/include/stdint.h
+++ b/include/stdint.h
@@ -122,4 +122,4 @@
 
 #include_next <stdint.h>
 
-#endif  // _LIBCPP_STDINT_H
+#endif // _LIBCPP_STDINT_H