[jfx11u] RFR: 8266462: Update copyright years of javafx.web native sources in jfx11u

[Kevin Rushforth]

As mentioned in the JBS bug report, this is needed to minimize gratuitous diffs in the native WebKit sources between mainline and jfx11u. These diffs can make it hard to see whether there is any substantive diff between the two and also can sometimes lead to merge conflicts.

In addition to the copyright year changes, which only touched the comments (as with all updates to the copyright year), I corrected one white space difference between jfx and jfx11u. So only a sanity build is needed, which I did.

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Commit messages:
 - 8266462: Update copyright years of javafx.web native sources in jfx11u

Changes: https://git.openjdk.java.net/jfx11u/pull/29/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jfx11u&pr=29&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8266462
  Stats: 214 lines in 214 files changed: 0 ins; 0 del; 214 mod
  Patch: https://git.openjdk.java.net/jfx11u/pull/29.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx11u pull/29/head:pull/29

PR: https://git.openjdk.java.net/jfx11u/pull/29