RFR XXS 8133537: clarify position of unlock options in error messages

[Daniel D. Daugherty]

Greetings,

I have a very small code review request to clarify the wording used
when the following options are specified in the wrong place:

     -XX:+UnlockDiagnosticVMOptions
     -XX:+UnlockExperimentalVMOptions

Even though this is a trivial change on the surface, we will not be
following the HotSpot Trivial Change Rules. This means I need two
reviewers and one must be a (R)eviewer.

See the bug link for examples of the new output.

8133537: clarify position of unlock options in error messages
https://bugs.openjdk.java.net/browse/JDK-8133537

Webrev URL: http://cr.openjdk.java.net/~dcubed/8133537-webrev/0-jdk9-hs-rt/

Testing: JPRT -testset hotspot is in process
          Aurora Adhoc Runtime-SVC Nightly testing (will be submitted next)
          (sanity check to make sure new error message line
           does not break any tests)

Thanks, in advance, for any comments, questions or suggestions.

Dan