run-postinsts: Fix ipk package management detection

run-postinsts always mark ipk package management as true, causing
problems when try to execute opkg-cl and isn't present.

(From OE-Core rev: 84dcc8dded5761e24e09dbcc822445ce3dd69497)

Signed-off-by: Aníbal Limón <anibal.limon@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/run-postinsts/run-postinsts/run-postinsts

@@ -27,7 +27,10 @@ for pm in $backend_list; do
 			;;
 
 		"ipk")
-			pm_installed=true
+			if [ -s "/var/lib/opkg/status" ]; then
+				pm_installed=true
+				break
+			fi
 			;;
 	esac
 done