<Swing Dev> RFR: JDK-8263235 : sanity/client/SwingSet/src/ColorChooserDemoTest.java failed throwing java.lang.NoClassDefFoundError

[Amresh Sahu]

Added @build org.jemmy2ext.JemmyExt.

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Commit messages:
 - JDK-8263235:Added @build org.jemmy2ext.JemmyExt
 - Merge pull request #2 from openjdk/master

Changes: https://git.openjdk.java.net/jdk/pull/2958/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2958&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8263235
  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2958.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2958/head:pull/2958

PR: https://git.openjdk.java.net/jdk/pull/2958