package/busybox: update licensing info

Busybox is mainly licensed under the GPL-2.0, but the bzip2 part is a
modified copy of the bzip2/libbzip2 project, which comes with its own
license.

Update the licensing information accordingly.

Add the hash for the new license file, and fixup indentation (2 spaces).

Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/busybox/busybox.hash

@@ -1,4 +1,5 @@
 # From https://busybox.net/downloads/busybox-1.32.0.tar.bz2.sha256
-sha256 c35d87f1d04b2b153d33c275c2632e40d388a88f19a9e71727e0bbbff51fe689  busybox-1.32.0.tar.bz2
+sha256  c35d87f1d04b2b153d33c275c2632e40d388a88f19a9e71727e0bbbff51fe689  busybox-1.32.0.tar.bz2
 # Locally computed
-sha256 bbfc9843646d483c334664f651c208b9839626891d8f17604db2146962f43548  LICENSE
+sha256  bbfc9843646d483c334664f651c208b9839626891d8f17604db2146962f43548  LICENSE
+sha256  b5a136ed67798e51fe2e0ca0b2a21cb01b904ff0c9f7d563a6292e276607e58f  archival/libarchive/bz/LICENSE

package/busybox/busybox.mk

@@ -7,8 +7,8 @@
 BUSYBOX_VERSION = 1.32.0
 BUSYBOX_SITE = http://www.busybox.net/downloads
 BUSYBOX_SOURCE = busybox-$(BUSYBOX_VERSION).tar.bz2
-BUSYBOX_LICENSE = GPL-2.0
-BUSYBOX_LICENSE_FILES = LICENSE
+BUSYBOX_LICENSE = GPL-2.0, bzip2-1.0.4
+BUSYBOX_LICENSE_FILES = LICENSE archival/libarchive/bz/LICENSE
 
 define BUSYBOX_HELP_CMDS
 	@echo '  busybox-menuconfig     - Run BusyBox menuconfig'