RFR: 8311661: Resolve duplicate symbol of StringTable::StringTable with JDK static linking [v3]

[Jiangli Zhou]

> Move StringTable to JavaClassFile namespace.

Jiangli Zhou 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 five additional commits since the last revision:

 - Merge branch 'master' into JDK-8311661
 - - Change to use a hotspot global namespace, based on the discussions in this PR thread. The namespace is 'hotspot_jvm', which may have less chance of collisions than 'hotspot'.
   - Use 'using' directive in precompiled.hpp, as suggested by others in the PR comments.
 - Merge branch 'master' into JDK-8311661
 - Move  '} // namespace JavaClassFile' to after '#endif //INCLUDE_CDS_JAVA_HEAP'.
 - 8311661: Resolve duplicate symbol of StringTable::StringTable with JDK static linking

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Changes:
  - all: https://git.openjdk.org/jdk/pull/14808/files
  - new: https://git.openjdk.org/jdk/pull/14808/files/c31ad972..3385b743

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=14808&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14808&range=01-02

  Stats: 1783 lines in 118 files changed: 1218 ins; 333 del; 232 mod
  Patch: https://git.openjdk.org/jdk/pull/14808.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14808/head:pull/14808

PR: https://git.openjdk.org/jdk/pull/14808