RFR: 8275145: file.encoding system property has an incorrect value on Windows

[Mandy Chung]

On Thu, 14 Oct 2021 15:50:28 GMT, Naoto Sato <naoto at openjdk.org> wrote:

> Fixing a regression in which `file.encoding` was initialized by `sprops->encoding` instead of `sprops->sun_jnu_encoding` on non macOS platforms. tier1-3 tests passed on all platforms.

Marked as reviewed by mchung (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/5953