RFR: 8217612: (CL)HSDB cannot show some JVM flags

[Yasumasa Suenaga]

Hi all,

Please review this change.

  JBS: https://bugs.openjdk.java.net/browse/JDK-8217612
  webrev: http://cr.openjdk.java.net/~ysuenaga/JDK-8217612/webrev.00/


"Show -XX flags" on HSDB and `flags` command on CLHSDB show -XX flags.
However some flags cannot do so.

sun.jvm.hotspot.runtime.VM.Flag handles -XX flags in debuggee, but it do not
handle following types:

  - ccstr
  - ccstrlist
  - double
  - uint64_t


This webrev has passed all tests on submit repo.


Thanks,

Yasumasa