Fix driver reinstall not handling tmpwatch

scripts/reinstall_ceilo_driver.sh

@@ -21,14 +21,17 @@ if [ ! -f $TARBALL ]; then
 fi
 
 SRC_DIR="/tmp/moxa"
-if [ ! -d $SRC_DIR ]; then
+if [ -d $SRC_DIR ]; then
+    # remove old extract and always re-extract
+    rm -rf /tmp/moxa
+fi
+
 cd `dirname $SRC_DIR`
 tar -xzf $TARBALL
 if [ ! -d $SRC_DIR ]; then
     echo "ERROR: Could not extract moxa drivers"
     exit 1
 fi
-fi
 
 DRIVER_DST="/usr/lib/npreal2/driver"