initscripts: let status return 0 when proc is running well

Ensure that the status returns 0 instead of the last shell command result,
otherwise the calling script can not properly detect the status of pid.

(From OE-Core master rev: d9d4fdc769dfe6bf9838f5c5f3189a80f0e3cf90)

(From OE-Core rev: 74c3959c7b4554fa706cfb177446050798be67b5)

Signed-off-by: Jesse Zhang <sen.zhang@windriver.com>
Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

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

@@ -52,6 +52,7 @@ status() {
     pid=`pidofproc $1`
     if [ -n "$pid" ]; then
         echo "$1 (pid $pid) is running..."
+        return 0
     else
         echo "$1 is stopped"
     fi