RFR: 7998: Upgrading spifly and jetty project version

[Virag Purnam]

Eclipse 22-12 uses Jetty Project 10.0.12 and ASM 9.4. To keep the versions consistent with Eclipse 22-12, upgraded the third party libraries. I will update the **thirdpartyreadme.txt** file later.
Jetty Project from10.0.11 to 10.0.12.
Spifly from 1.3.4 to 1.3.6. (To match ASM 9.4)

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Commit messages:
 - 7998: Upgrading spifly and jetty project version

Changes: https://git.openjdk.org/jmc/pull/461/files
 Webrev: https://webrevs.openjdk.org/?repo=jmc&pr=461&range=00
  Issue: https://bugs.openjdk.org/browse/JMC-7998
  Stats: 7 lines in 2 files changed: 0 ins; 0 del; 7 mod
  Patch: https://git.openjdk.org/jmc/pull/461.diff
  Fetch: git fetch https://git.openjdk.org/jmc pull/461/head:pull/461

PR: https://git.openjdk.org/jmc/pull/461