Add temporary comment

Author: tsayukov

util/system/src_root.h

@@ -29,6 +29,7 @@ namespace NPrivate {
 
 #define STATIC_BUF(x) ::NPrivate::TStaticBuf(x, sizeof(x) - 1)
 
+    // TODO: remove this comment
     constexpr TStaticBuf ArcRoot = STATIC_BUF(Y_STRINGIZE(ARCADIA_ROOT));
     constexpr TStaticBuf BuildRoot = STATIC_BUF(Y_STRINGIZE(ARCADIA_BUILD_ROOT));