git: openjdk/mobile: 8241975: Run jdk/jfr/event/metadata/TestLookForUntestedEvents.java in tier3

[duke]

Changeset: 1b45bf2d
Author:    Mikhailo Seledtsov <mseledtsov at openjdk.org>
Date:      2020-04-17 09:53:56 +0000
URL:       https://git.openjdk.java.net/mobile/commit/1b45bf2d

8241975: Run jdk/jfr/event/metadata/TestLookForUntestedEvents.java in tier3

Added the test to jdk_tier3 via jdk_jfr_tier3

Reviewed-by: egahlin

! test/jdk/TEST.groups