RFR: Created maven binding to make easy maven integration

[Jiří Vaněk]

Simplest maven wrapper without any duplicated code (with hardcoded version) to allow simple asmtools usage via maven depndencies. The namespace (org.openjdk) is same as for JMH

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Commit messages:
 - Created maven binding to make easy maven integration

Changes: https://git.openjdk.java.net/asmtools/pull/15/files
 Webrev: https://webrevs.openjdk.java.net/?repo=asmtools&pr=15&range=00
  Stats: 121 lines in 3 files changed: 121 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/asmtools/pull/15.diff
  Fetch: git fetch https://git.openjdk.java.net/asmtools pull/15/head:pull/15

PR: https://git.openjdk.java.net/asmtools/pull/15