[jdk8u-ri] RFR: 8079087: Add support for Cygwin 2.0

[Erik Joelsson]

This is a backport of three Cygwin related fixes from jdk8u. In order to better facilitate development in jdk8u-ri, I would like to get these fixes in, so that developers may use recent versions of Cygwin as build environment for this repository. I'm not even sure it's possible to install a pre Cygwin 2.0 environment anymore. All three fixes have been used successfully in jdk8u for years.

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Commit messages:
 - Update copyright year
 - Backport 8179675: Build with error on windows with new Cygwin grep
 - Backport 8176033: New cygwin grep does not match \r as newline
 - Backport: 8079087: Add support for Cygwin 2.0

Changes: https://git.openjdk.java.net/jdk8u-ri/pull/3/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk8u-ri&pr=3&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8079087
  Stats: 21 lines in 3 files changed: 5 ins; 0 del; 16 mod
  Patch: https://git.openjdk.java.net/jdk8u-ri/pull/3.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk8u-ri pull/3/head:pull/3

PR: https://git.openjdk.java.net/jdk8u-ri/pull/3