[jfx11u] RFR: 8260245: Update ICU4C to version 68.2

Wed May 5 18:01:52 UTC 2021

On Wed, 5 May 2021 12:00:25 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

> Backport ICU update from jfx mainline to jfx11u. The backport was clean except for a minor diff in the surrounding context in `build.gradle`. I ran a sanity test on Windows (I'll test on other two platforms before integrating).

Works fine on Linux, still doing mac but no problems so far

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Marked as reviewed by jvos (Reviewer).

PR: https://git.openjdk.java.net/jfx11u/pull/3