rpm2cpio does not support bz2

[Pascal Bellard]

Hello,

Here is a fix (rpm is ok):
http://hg.slitaz.org/wok/raw-file/tip/busybox/stuff/busybox-1.12.0-rpm2cpio.u
busybox rpm2cpio 1.15 does not support bz2 too.

Hope it helps,

-pascal