swupdate_2016.07: missing inherit for init script

Signed-off-by: Stefano Babic <sbabic@denx.de>

recipes-support/swupdate/swupdate_2016.07.bb

@@ -1,7 +1,12 @@
 require swupdate.inc
 
+inherit update-rc.d
+
 SRC_URI = "git://github.com/sbabic/swupdate.git;protocol=git;tag=2016.07 \
      file://defconfig \
      file://swupdate \
      file://swupdate.service \
      "
+
+INITSCRIPT_NAME = "swupdate"
+INITSCRIPT_PARAMS = "defaults 70"