stand/usb: Quiet warnings so this builds againReviewed by: markj, emasteDifferential Revision: https://reviews.freebsd.org/D48411
Remove $FreeBSD$: one-line sh patternRemove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/
Remove $FreeBSD$: one-line .c comment patternRemove /^/[*/]\s*\$FreeBSD\$.*\n/
Move the stand/usb test loader into its own directory.Fix its Makefile to build correctly.MFC after: 1 weekSponsored by: Mellanox Technologies