RFR: 8275375: [REDO] JDK-8271949 dumppath in -XX:FlightRecorderOptions does not affect [v4]

[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 with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains six additional commits since the last revision:

 - Add dumppath to JFR.configure dcmd
 - Add "\n" after printing exception
 - Merge remote-tracking branch 'upstream/master' into JDK-8275375-2
 - Propagate IOException at setDumpPath() to the caller
 - Refactoring setDumpPath related code
 - 8275375: [REDO] JDK-8271949 dumppath in -XX:FlightRecorderOptions does not affect

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/6000/files
  - new: https://git.openjdk.java.net/jdk/pull/6000/files/9e11ae4e..42633f22

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6000&range=03
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6000&range=02-03

  Stats: 17680 lines in 375 files changed: 14813 ins; 1866 del; 1001 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