swupdate: replace /usr/lib in init.d to support multilib images

This should reference ${libdir}, since that's where swupdate.sh gets
installed.

Signed-off-by: Kyle Russell <bkylerussell@gmail.com>
Acked-by: Stefano Babic <sbabic@denx.de>

recipes-support/swupdate/swupdate.inc

@@ -235,6 +235,7 @@ do_install () {
 
     install -d ${D}${sysconfdir}/init.d
     install -m 755 ${WORKDIR}/swupdate ${D}${sysconfdir}/init.d
+    sed -i -e "s|/usr/lib/|${libdir}/|" ${D}${sysconfdir}/init.d/swupdate
 
     # shell based configuration loader allows to place code snippets into this folder
     install -d ${D}${libdir}/swupdate/conf.d