uclibc: Add new functionality needed for systemd 209

implement eventfd_read and eventfd_write and setns

Define F_SETPIPE_SZ and F_GETPIPE_SZ

Signed-off-by: Khem Raj <raj.khem@gmail.com>
systemd: Upgrade 208 -> 209

Remove upstreamed patches and remove obsolete patches

Forward port uclibc patches and add new patch to tackle uclibc conflicts
with sysinfo.h

Package additional busctl daemon and libsystemd library

Signed-off-by: Khem Raj <raj.khem@gmail.com>