RFR: JMC-7338: Add parser support for frame types generated by async-profiler

[Jaroslav Bachorik]

Async Profiler (https://github.com/jvm-profiling-tools/async-profiler) is able to generate JFR recordings with CPU and allocation sample events spanning full-stack (from Java to OS/kernel).
It is adding three new frame types for this reason:

- Native (C)
- C++
- Kernel
 

Currently, the JMC parser will process all those frame types as 'UNKNOWN'. Although it is not breaking the rendering it would be nice to be able to get more info about the actual frame type.

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Commit messages:
 - JMC-7338: Add parser support for frame types generated by async-profiler

Changes: https://git.openjdk.java.net/jmc/pull/274/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jmc&pr=274&range=00
  Issue: https://bugs.openjdk.java.net/browse/JMC-7338
  Stats: 25 lines in 2 files changed: 23 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jmc/pull/274.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/274/head:pull/274

PR: https://git.openjdk.java.net/jmc/pull/274