kirkwood: add support for Iomega StorCenter ix2-200

Signed-off-by: Richard Kunze <richard.kunze@web.de>
e2fsprogs: bump version to 1.42.12

This fixes compilation errors with musl

Signed-off-by: Richard Kunze <richard.kunze@web.de>
e2fsprogs: Add Build/InstallDev to install header files for libext2fs and libco$

This allows to compile packages that depend on libext2fs / libcomm_err

Signed-off-by: Richard Kunze <richard.kunze@web.de>
btrfs-progs: copy from "oldpackages" feed, bump version to v3.17.1

Note: At the moment, btrfs-tools do not compile against default uClibc
because xattr support is not enabled in uClibc. Set UCLIBC_HAS_XATTR=y
in toolchain/uClibc/config-0.9.33.2/common in order to compile btrfs-progs.

Signed-off-by: Richard Kunze <richard.kunze@web.de>