Review Request: jdeps --require and --check should detect the specified module in the image

[Mandy Chung]

http://cr.openjdk.java.net/~mchung/jdk9/webrevs/8172212/webrev.00/

This is a simple patch that fixes jdeps in analyzing modules linked in the 
image. It fixes the following commands which are currently not working properly.

$ jdeps -I -—require jdk.compiler
$ jdeps -—check jdk.compiler

This patch changes not to require classes or —-add-modules be specified, if 
it’s a module in the image.  This patch also fixes when —-list-deps is used 
with -m and prints the result if the source is a named module.

Mandy