lz4: fix CC

It defined the CC to ${TARGET_PREFIX}gcc which lost the --sysroot and was
incorrect, it would cause unexpected errors, we should define it as CC=${CC}.

[YOCTO #5869]

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
systemd: Upgrade 208 -> 210

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>