scripts/linux/network: exit normally if no network control script

When using suspend/resume from the hypervisor, openvmtools checks for the
networking script, and exists with an error if not found, making the hypervisor
raise a warning message. This workaround silences that error message.

Signed-off-by: Karoly Kasza <kaszak@gmail.com>

--- open-vm-tools-9.4.6-1770165.orig/scripts/linux/network	2014-07-02 00:21:14.000000000 +0200
+++ open-vm-tools-9.4.6-1770165/scripts/linux/network	2014-08-07 16:34:21.963514273 +0200
@@ -88,7 +88,9 @@
 run_network_script()
 {
    script=`find_networking_script`
-   [ "$script" != "error" ] || Panic "Cannot find system networking script."
+#   [ "$script" != "error" ] || Panic "Cannot find system networking script."
+# Modified for buildroot
+   [ "$script" != "error" ] || exit 0
 
    # Using SysV "service" if it exists, otherwise fall back to run the script directly
    service=`which service 2>/dev/null`