[TOOLS] Rename chekc_hotplug to check_udev and fix permissions.

Signed-off-by: Keir Fraser <keir@xensource.com>

tools/check/check_udev

@@ -0,0 +1,16 @@
+#!/bin/bash
+# CHECK-INSTALL
+
+function error {
+   echo
+   echo '  *** Check for udev/hotplug FAILED'
+   exit 1
+}
+[ -x "$(which udevinfo)" ] && \
+  UDEV_VERSION=$(udevinfo -V | sed -e 's/^[^0-9]* \([0-9]\{1,\}\)[^0-9]\{0,\}/\1/')
+
+if [ -n "$UDEV_VERSION" ] && [ $UDEV_VERSION -ge 059 ]; then
+  exit 0
+fi
+
+which hotplug 1>/dev/null 2>&1 || error