RFR: 8326406: Remove mapfile support from makefiles [v3]

[Magnus Ihse Bursie]

> Once [JDK-8017234](https://bugs.openjdk.org/browse/JDK-8017234) is done, we have no need for mapfiles anymore in the JDK project. The mapfile handling was inherited from the old build system and is just messy. We should remove it to make the linking process more clear.
> 
> Note that this PR is [dependent on](https://mail.openjdk.org/pipermail/jdk-dev/2021-March/005232.html) https://github.com/openjdk/jdk/pull/17955.

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 10 commits:

 - SetupLinkingMicrosoft is not needed once mapfiles are removed
 - Merge branch 'master' into remove-mapfile-support
 - 8326406: Remove mapfile support from makefiles
 - Revert "Use #pragma instead of HIDDEN define"
   
   This reverts commit 00e40a7f6e4cdef6592d72b3d08063cdcc41532a.
 - Use #pragma instead of HIDDEN define
 - Rename the version script to version-script.txt
 - Restore linker script to linux/gcc builds
 - Rename the Windows export file to .def
 - Remove unused symbol _Copy_conjoint_bytes on linux/arm32
 - 8017234: Hotspot should stop using mapfiles

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Changes: https://git.openjdk.org/jdk/pull/17982/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17982&range=02
  Stats: 70 lines in 5 files changed: 0 ins; 62 del; 8 mod
  Patch: https://git.openjdk.org/jdk/pull/17982.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17982/head:pull/17982

PR: https://git.openjdk.org/jdk/pull/17982