RFR: 8326953: Possible race in creation of win-exports.def [v3]

[Magnus Ihse Bursie]

> We have seen a build failure along the lines of:
> 
>  /usr/bin/mv: cannot move '.../build/windows-x64-open-debug/hotspot/variant-server/libjvm/win-exports.def.tmp' to '.../build/windows-x64-open-debug/hotspot/variant-server/libjvm/win-exports.def': No such file or directory
> 
> on Windows.
> 
> My guess is that this is a race between creating the win-export.def file for the gtest jvm and the product jvm.

Magnus Ihse Bursie has updated the pull request incrementally with two additional commits since the last revision:

 - Also restore newline
 - Roll back gtest changes

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/18043/files
  - new: https://git.openjdk.org/jdk/pull/18043/files/f574d063..18e03322

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18043&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18043&range=01-02

  Stats: 33 lines in 2 files changed: 1 ins; 18 del; 14 mod
  Patch: https://git.openjdk.org/jdk/pull/18043.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18043/head:pull/18043

PR: https://git.openjdk.org/jdk/pull/18043