Option to disable dSYM generation

An incremental build and link for a project of mine takes 1-3 seconds, but generating a dSYM takes 60 seconds, which makes qbs not usable for debug-build-run iteration.  I had to comment out line 1175 from share/qbs/modules/cpp/gcc.js to disable it.  It would be nice if there was a module property to toggle it or some other means. I believe CMake (xcode generation) and XCode give you that choice (ie. dwarf or dwarf-with-dsym).  Thanks.

1174 cmd.description = "generating dSYM for " + product.name;
1175 //commands.push(cmd);