Auto merge of #3724 - bjorn3:use_symbol_name_query, r=RalfJung

Use the symbol_name query instead of trying to infer from the link_name attribute

This prevents the calculated name from going out of sync with exported_symbols. It also avoids having to special case the panic_impl lang item.

It also makes it easier to fix miri with rust-lang/rust#127173.

Author: bors