RFR: 8145235: Deprecate product flags that have been converted to Unified Logging

[Rachel Protacio]

Hi,

Please review this enhancement that prints a deprecation message for the 
product flags we have aliased to UL options. We wanted to mimic the GC 
deprecation messages as seen in arguments.cpp, e.g.

    log_warning(gc)("-XX:+PrintGCDetails is deprecated. Will use
    -Xlog:gc* instead.");

I have logged our deprecation messages to a new tag 'arguments' at the 
'warning' level (warning-level logging is always printed, without having 
to be directly specified in the command line).

Basic sample output:

    $ java -XX:+TraceMonitorInflation -version
    [0.001s][warning][arguments] -XX:+TraceMonitorInflation is
    deprecated. Will use -Xlog:monitorinflation=debug instead.
    ...

Sample output with "-"/"off" and multiple tags:

    $ java -XX:-TraceClassLoadingPreorder -version
    [0.001s][warning][arguments] -XX:-TraceClassLoadingPreorder is
    deprecated. Will use -Xlog:classload,preorder=off instead.
    ...

Bug: https://bugs.openjdk.java.net/browse/JDK-8145235
Open webrev: http://cr.openjdk.java.net/~rprotacio/8145235/

Tested locally for robustness w.r.t. multi-tag tagsets, multiple aliased 
flags, etc.

Thank you,
Rachel