The Skeleton initscript doesn't work on minimal image

Fixes bug [YOCTO #1165]

The /etc/init.d/skeleton doesn't work on minimal image, this is
because of the pidofproc doesn't return "$?" correctly, so store
$? in the variable status would fix it.

(From OE-Core rev: 4d31193a6969df25bb85a9862b7295e85dcec04b)

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/initscripts/initscripts-1.0/functions

@@ -18,7 +18,8 @@ pidofproc () {
 
 	# pidof output null when no program is running, so no "2>/dev/null".
 	pid=`pidof $1`
-	case $? in
+	status=$?
+	case $status in
 	0)
 		echo $pid
 		return 0
@@ -28,7 +29,7 @@ pidofproc () {
 		exit 127
 		;;
 	*)
-		return $?
+		return $status
 		;;
 	esac
 }