hg: jdk/jdk: 8201554: Disable failing tier1 test for JDK-8201498

[jonathan.gibbons at oracle.com]

Changeset: 8c85a1855e10
Author:    mcimadamore
Date:      2018-04-13 11:14 -0700
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/8c85a1855e10

8201554: Disable failing tier1 test for JDK-8201498
Reviewed-by: jjg

! test/langtools/tools/javac/diags/examples.not-yet.txt
- test/langtools/tools/javac/diags/examples/PreviewPluralAdditional/PreviewPluralAdditional.java
- test/langtools/tools/javac/diags/examples/PreviewPluralAdditional/PreviewPluralAdditionalBar.java