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-perl/recipes-extended/logcheck/logcheck_1.4.3.bb

@@ -49,7 +49,7 @@ do_install() {
     # Don't install /var/lock when populating rootfs. Do it through volatile
     if ${@bb.utils.contains('DISTRO_FEATURES', 'sysvinit', 'true', 'false', d)}; then
         install -d ${D}${sysconfdir}/default/volatiles
-        install -m 0644 ${WORKDIR}/99_logcheck ${D}${sysconfdir}/default/volatiles
+        install -m 0644 ${UNPACKDIR}/99_logcheck ${D}${sysconfdir}/default/volatiles
     fi
     if ${@bb.utils.contains('DISTRO_FEATURES', 'systemd', 'true', 'false', d)}; then
         install -d ${D}${sysconfdir}/tmpfiles.d

meta-perl/recipes-perl/libdb/libdbd-sqlite-perl_1.74.bb

@@ -33,7 +33,7 @@ RDEPENDS:${PN} += "libdbi-perl \
 
 do_install:append() {
     if [ ${PERL_DBM_TEST} = "1" ]; then
-        install -m 755 -D ${WORKDIR}/sqlite-perl-test.pl ${D}/${bindir}/sqlite-perl-test.pl
+        install -m 755 -D ${UNPACKDIR}/sqlite-perl-test.pl ${D}/${bindir}/sqlite-perl-test.pl
     fi
 }