linuxboot: dot not use libusb from host system.

[Pierre B. <pie...@ar...>]

Hello,

A proposed patch for linuxboot/Makefile:

  * do not user/rely on the libusb provided by the host (building) system,
    build our own lib,

  * lsusb utility is no more built as a static binary

  * lsusb uses a compressed version of usb.ids(.gz), since libz is
    available.

Boot images are not bigger than the static version of lsusb:

  -26036   unattended/linuxboot/linuxboot.iso
  +25828   unattended/linuxboot/linuxboot.iso
  -24108   unattended/linuxboot/tftpboot/initrd
  +23900   unattended/linuxboot/tftpboot/initrd


my 200kB ;-)

Regards,

Pierre