RFR: 8339480: Build static-jdk image with a statically linked launcher [v2]

[Magnus Ihse Bursie]

> As a prerequisite for Hermetic Java, we need a statically linked `java` launcher. It should behave like the normal, dynamically linked `java` launcher, except that all JDK native libraries should be statically, not dynamically, linked.
> 
> This patch is the first step towards this goal. It will generate a `static-jdk` image with a statically linked launcher. This launcher is missing several native libs, however, and does therefore not behave like a proper dynamic java. One of the reasons for this is that local symbol hiding in static libraries are not implemented yet, which causes symbol clashes when linking all static libraries together. This will be addressed in an upcoming patch. 
> 
> All changes in the `src` directory are copied from, or inspired by, changes made in [the hermetic-java-runtime branch in Project Leyden](https://github.com/openjdk/leyden/tree/hermetic-java-runtime).

Magnus Ihse Bursie has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:

 - Merge branch 'master' into static-jdk-image
 - Makefile changes needed for static-launcher and static-jdk-image targets
 - Incorporate changes from leyden/hermetic-java-runtime that allows running a static launcher

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Changes:
  - all: https://git.openjdk.org/jdk/pull/20837/files
  - new: https://git.openjdk.org/jdk/pull/20837/files/43f57b80..0717600c

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=20837&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=20837&range=00-01

  Stats: 239454 lines in 2229 files changed: 213080 ins; 14335 del; 12039 mod
  Patch: https://git.openjdk.org/jdk/pull/20837.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20837/head:pull/20837

PR: https://git.openjdk.org/jdk/pull/20837