[11] RFR JDK-8196310: jlink --suggest-providers fails with missing resource if --output specified

[mandy chung]

(resend with fixed formatting)

Webrev:
    http://cr.openjdk.java.net/~mchung/jdk11/webrevs/8196310/webrev.00/


Improve the error message when invalid argument is specified to
--suggest-providers option.


$ jlink --add-modules java.base --suggest-providers java.security.Provider --output myimage
Error: --suggest-providers does not accept "--output myimage" argument


Mandy