RFR: 7260: Create a new serializers bundle [v3]

[Marcus Hirt]

> This creates a new core bundle that can be used to serialize data from JFR into various popular formats, such as DOT and JSON.

Marcus Hirt has updated the pull request incrementally with one additional commit since the last revision:

  Adding dependency on jfr

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Changes:
  - all: https://git.openjdk.java.net/jmc/pull/254/files
  - new: https://git.openjdk.java.net/jmc/pull/254/files/fc3fb859..97354e10

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jmc&pr=254&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jmc&pr=254&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jmc/pull/254.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/254/head:pull/254

PR: https://git.openjdk.java.net/jmc/pull/254