RFR: 7902638: TestResult may count lines incorrectly

[Dmitry Bessonov]

This is the fix for https://bugs.openjdk.java.net/browse/CODETOOLS-7902638
Changed behavior to handle not only "\n" as line ending but "\r" and "\r\n" as well.
Updated regression tests that were matching the current behavior and so started to fail.

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Commit messages:
 - 7902638: TestResult may count lines incorrectly

Changes: https://git.openjdk.java.net/jtharness/pull/1/files
 Webrev: https://webrevs.openjdk.java.net/jtharness/1/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/CODETOOLS-7902638
  Stats: 104 lines in 2 files changed: 85 ins; 0 del; 19 mod
  Patch: https://git.openjdk.java.net/jtharness/pull/1.diff
  Fetch: git fetch https://git.openjdk.java.net/jtharness pull/1/head:pull/1

PR: https://git.openjdk.java.net/jtharness/pull/1