[jdk11u-dev] RFR: 8251558: J2DBench should support shaped and translucent windows

[Andrew John Hughes]

I discovered this change when looking at potential conflicts for JDK-8275872. Shaped and translucent windows have been supported since OpenJDK 6, so having support for these in 11u's J2DBench seems appropriate and a good way of testing these features.

I've dropped the `Makefile`, `README` & `build.xml` changes which bump the source & target to 1.7 as the 11u javac compiler can still compile for 1.6. Other than that, the patch applies as is, bar some copyright conflicts, thanks to JDK-8211693 : "Convert C-style array declarations in client demos and jdk.accessibility" and JDK-8223237: "Replace use of string.equals("") with isEmpty() in java.desktop". The absence of the latter also means we don't need to revert it in `OutputImageTests.java` & `InputImageTests.java`

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Commit messages:
 - Backport 484864c932c34bc7e338b100411f9245f35fc4a4

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/613/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=613&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8251558
  Stats: 131 lines in 4 files changed: 121 ins; 3 del; 7 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/613.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/613/head:pull/613

PR: https://git.openjdk.java.net/jdk11u-dev/pull/613