Install kali-linux-firmware in Live images

It used to be pulled in as a dependency of kali-linux-headless, but it
just changed, now we must install it manually.

kali-config/common/package-lists/hardware-support.list.chroot

@@ -1,9 +1,9 @@
 ##
-## Add extra firmware (kali-linux-headless depends on firmware we wants, but
-## some can't be put there because they require network access... but we
-## install those in the live image anyway since we have network access
-## when we build the live ISO).
+## The b43 firmware require network access, hence are not dependencies of
+## kali-linux-firmware. But we install those in the live image anyway,
+## since we have network access when we build the live ISO.
 ##
+kali-linux-firmware
 #if ARCHITECTURES i386 amd64
 firmware-b43legacy-installer
 firmware-b43-installer