Er... No. There should be files under /usr//lib/modules already if the kernel is reasonably up to date. Upgrading glibc will not populate that directory. The most important files there will be part of the linux package (for the stock kernel), perhaps with some additions if special ones have been added.
If there are no files under /usr/lib/modules, then the kernel was not sufficiently up to date for the modules to be there. In that case, you would need to reinstall the relevant package (e.g. linux). However, if your machine still boots, I think /usr/lib/modules must be populated.