brotli: allow building a -native version

nodejs (-native) can be built against a system-installed version of
the brotli libraries. Allow doing that by provide a -native version
of brotli.

Signed-off-by: André Draszik <andre.draszik@jci.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-extended/brotli/brotli_1.0.7.bb

@@ -18,3 +18,5 @@ do_install_append () {
 		mv -v "${lib}" "$(echo ${lib} | sed s/-static//)"
 	done
 }
+
+BBCLASSEXTEND = "native"