freebsd-tools: bump 10.1
remove app-shells/bash/bash-4.2-fbsd-EINTR.patch, fixed in gentoo-x86 tree.
added 10.1 profile.
added Upgrade guide to Gentoo/FreeBSD 10.1 from 9.1.
synced to gentoo-bsd overlay.
sync_bsd_overlay.sh: added GNU sed wrapper