RFC Final Comment Period: Add -Wl,-z,pack-relative-relocs

An RFC has now entered its Final Comment Period. In 14 days, discussion will end and the proposal will either be accepted, rejected or withdrawn: https://gitlab.archlinux.org/archlinux/rfcs/-/merge_requests/23 Please visit the above link for discussion. Summary: Add -Wl,-z,pack-relative-relocs to our LDFLAGS in order to reduce the size of relocations.