package/raspberrypi-usbboot: bump version to 9324fd7

package/raspberrypi-usbboot: bump version to 9324fd7

- add license description/file/hash

- rebased 0001-Makefile-allow-passing-CFLAGS-LDFLAGS.patch

- removed 0002-Makefile-add-DESTDIR-support.patch
  (Makefile install target removed since [1])

- removed 0003-main.c-rework-logic-to-find-def1-def2-and-def3-files.patch
  (bootcode.bin/bootcode4.bin and start.elf/start4.elf compiled in since [2])

- change host install command

[1] https://github.com/raspberrypi/usbboot/commit/9e6ff777bbf271b75aa0b1aa24e6f12d7b768375
[2] https://github.com/raspberrypi/usbboot/commit/1bb4c2da4775329bcf5811616fc8f0ce78ee2121

Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>