Translations:Upgrading GCC/22/en

This is only needed till GCC 4.1/5.1 because from that version onward, GCC uses a forward-compatible ABI, which removes the need for rebuilding applications and libraries. Of course, guarantees can never be given indefinitely, but when an incompatibility occurs again, we'll definitely document it here and release a news item. In that case, the version of the libstdc++.so library will probably be increased.