recipes: Start WORKDIR -> UNPACKDIR transition

Replace references of WORKDIR with UNPACKDIR where it makes sense to do
so in preparation for changing the default value of UNPACKDIR.

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

meta-networking/dynamic-layers/meta-python/recipes-connectivity/firewalld/firewalld_1.3.2.bb

@@ -146,7 +146,7 @@ do_install:append() {
         # firewalld ships an init script but it contains Red Hat-isms, replace it with our own
         rm -rf ${D}${sysconfdir}/rc.d/
         install -d ${D}${sysconfdir}/init.d
-        install -m0755 ${WORKDIR}/firewalld.init ${D}${sysconfdir}/init.d/firewalld
+        install -m0755 ${UNPACKDIR}/firewalld.init ${D}${sysconfdir}/init.d/firewalld
     fi
 
     if ${@bb.utils.contains('DISTRO_FEATURES', 'polkit', 'false', 'true', d)}; then