RFR: 6871: Upgrade to ASM 8.0.1

[Marcus Hirt]

Also, updating expectations to (at least) JDK 8, as core and the rest of JMC 8 will require 8.

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Commit messages:
 - 6871: Upgrade to ASM 8.0.1

Changes: https://git.openjdk.java.net/jmc/pull/96/files
 Webrev: https://webrevs.openjdk.java.net/jmc/96/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/JMC-6871
  Stats: 4 lines in 2 files changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.java.net/jmc/pull/96.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/96/head:pull/96

PR: https://git.openjdk.java.net/jmc/pull/96