hg: jigsaw/jigsaw/jdk: Check if natcmd directory exists before use

[dalibor.topic at sun.com]

Changeset: 66cf4275f76e
Author:    robilad
Date:      2010-04-30 23:02 +0200
URL:       http://hg.openjdk.java.net/jigsaw/jigsaw/jdk/rev/66cf4275f76e

Check if natcmd directory exists before use

! src/share/classes/org/openjdk/jigsaw/cli/Packager.java
! test/org/openjdk/jigsaw/cli/JpkgArgsTest.java