RFR: 8339480: Build static-jdk image with a statically linked launcher [v14]

[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 pull request now contains 16 commits:

 - Merge branch 'master' into static-jdk-image
 - Also include information about where generated data is consumed.
 - Document how and why we keep track of native libraries per module
 - Remove unnecessary change for macOS in java_md.c
 - Merge branch 'master' into static-jdk-image
 - Merge branch 'master' into static-jdk-image
 - Merge branch 'master' into static-jdk-image
 - Fix bug in filtering out -Wl,--exclude-libs,ALL
 - Don't hardcode server variant
 - Setup LDFLAGS_STATIC_JDK
 - ... and 6 more: https://git.openjdk.org/jdk/compare/b8b70c8b...783f34d3

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Changes: https://git.openjdk.org/jdk/pull/20837/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20837&range=13
  Stats: 453 lines in 26 files changed: 374 ins; 5 del; 74 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