uutils-coreutils: add native and nativesdk

The project is getting more mature, and it's now doable to do a yocto build using uutils-coreutils-native.

Signed-off-by: Etienne Cordonnier <ecordonnier@snap.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-core/uutils-coreutils/uutils-coreutils_0.3.0.bb

@@ -63,6 +63,8 @@ python __anonymous() {
         d.setVarFlag('ALTERNATIVE_LINK_NAME', prog, '%s/%s' % (d.getVar('sbindir'), prog))
 }
 
+BBCLASSEXTEND = "native nativesdk"
+
 do_compile:prepend() {
     export LIBSTDBUF_DIR="${libdir}/coreutils"
 }