RFR: 8261030: Avoid loading GenerateJLIClassesHelper at runtime [v2]

[Claes Redestad]

> This moves the tracing methods added to GenerateJLIClassesHelper in JDK-8252725 to MethodHandleStatics, which avoids loading at runtime some code meant for jlink.

Claes Redestad has updated the pull request incrementally with one additional commit since the last revision:

  Remove RESOLVE constants, comment the trace methods

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/2376/files
  - new: https://git.openjdk.java.net/jdk/pull/2376/files/2931ef8a..5c2eff28

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=2376&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=2376&range=00-01

  Stats: 21 lines in 2 files changed: 8 ins; 7 del; 6 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2376.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2376/head:pull/2376

PR: https://git.openjdk.java.net/jdk/pull/2376