RFR: 8314029: Add file name parameter to Compiler.perfmap

[Yi-Fan Tsai]

`jcmd Compiler.perfmap` uses the hard-coded file name for a perf map: `/tmp/perf-%d.map`. This change adds an option for specifying a file name.

The help message of Compiler.perfmap:

Compiler.perfmap
Write map file for Linux perf tool.

Impact: Low

Syntax : Compiler.perfmap [options]

Options: (options must be specified using the <key> or <key>=<value> syntax)
        filename : [optional] Name of the map file (STRING, no default value)

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Commit messages:
 - Update parameter name
 - Update jcmd man page
 - Change to use filename and add a test
 - 8314029: Add file name parameter to Compiler.perfmap

Changes: https://git.openjdk.org/jdk/pull/15871/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15871&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8314029
  Stats: 69 lines in 7 files changed: 49 ins; 5 del; 15 mod
  Patch: https://git.openjdk.org/jdk/pull/15871.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15871/head:pull/15871

PR: https://git.openjdk.org/jdk/pull/15871