RFR: 8264863: Update JCov version to support JDK 17

[Alexandre Iline]

Use a build which uses ASM bundled into JDK.

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Commit messages:
 - 8264863: Update JCov version to support JDK 17

Changes: https://git.openjdk.java.net/jdk/pull/3380/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3380&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8264863
  Stats: 3 lines in 1 file changed: 0 ins; 1 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3380.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3380/head:pull/3380

PR: https://git.openjdk.java.net/jdk/pull/3380