[jdk11u-dev] RFR: 8303822: gtestMain should give more helpful output

[Matthias Baesken]

8303822: gtestMain should give more helpful output

-------------

Commit messages:
 - Backport 5296357fe27ac9f68c635cd1ba324c4985934354

Changes: https://git.openjdk.org/jdk11u-dev/pull/1884/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1884&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8303822
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1884.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/1884/head:pull/1884

PR: https://git.openjdk.org/jdk11u-dev/pull/1884