(14) RFR JDK-8225773: jdeps --check produces NPE if there are missing module dependences

[Mandy Chung]

Webrev:
    http://cr.openjdk.java.net/~mchung/jdk14/8225773/webrev.00/

jdeps --check throws NPE when the module descriptor has missing 
dependences.  This patch fixes jdeps --check option to report a module 
with missing dependences as other jdeps options.

This patch applies on the top of the patch for JDK-8229396 [1].

Thanks
Mandy
[1] 
http://mail.openjdk.java.net/pipermail/jigsaw-dev/2020-January/014342.html