RFR: 8275375: [REDO] JDK-8271949 dumppath in -XX:FlightRecorderOptions does not affect [v2]

[Yasumasa Suenaga]

> This PR is for redo-ing [JDK-8271949](https://bugs.openjdk.java.net/browse/JDK-8271949).
> I changed to use `SecuritySupport` at `Options::setDumpPath` as @egahlin mentioned. Please see change both Options.java and SecuritySupport.java .
> 
> I've tested this change with all jdk/jfr tests on Linux x64, and they works fine.
> @egahlin @mgronlun Can you run Mach5 tests with this change?

Yasumasa Suenaga has updated the pull request incrementally with one additional commit since the last revision:

  Refactoring setDumpPath related code

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/6000/files
  - new: https://git.openjdk.java.net/jdk/pull/6000/files/a3f67961..77a48a11

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6000&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6000&range=00-01

  Stats: 33 lines in 5 files changed: 11 ins; 9 del; 13 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6000.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6000/head:pull/6000

PR: https://git.openjdk.java.net/jdk/pull/6000