RFR: Jextract build fails on Windows (take two) [v2]

[Maurizio Cimadamore]

> It seems like [1] did not address all the issues with Windows build.
> This patch makes the quoting of the jlink options explicit, and different between Windows and the other systems.
> 
> I've verified on Windows (using powershell) and Ubuntu 20.04. Seems to work ok.
> 
> [1] - https://github.com/openjdk/jextract/pull/24

Maurizio Cimadamore has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains one commit:

  Initial push

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Changes: https://git.openjdk.java.net/jextract/pull/24/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jextract&pr=24&range=01
  Stats: 4 lines in 1 file changed: 3 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jextract/pull/24.diff
  Fetch: git fetch https://git.openjdk.java.net/jextract pull/24/head:pull/24

PR: https://git.openjdk.java.net/jextract/pull/24