[jdk17] RFR: 8271155: Wrong path separator in env variable

[Alexey Semenyuk]

On Thu, 22 Jul 2021 19:35:59 GMT, Alexey Semenyuk <asemenyuk at openjdk.org> wrote:

> Replace `";"` with `FileUtils::pathSeparator` in the expression adding 'app' dir to env variable in jpackage app launcher.

There is no unit test covering this area. I'll file follow up CR to add one in JDK18.

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PR: https://git.openjdk.java.net/jdk17/pull/271