hg: amber/amber: Add template-driven test case for expression switch

[brian.goetz at oracle.com]

Changeset: 5f1062f068d4
Author:    briangoetz
Date:      2018-04-16 15:11 -0400
URL:       http://hg.openjdk.java.net/amber/amber/rev/5f1062f068d4

Add template-driven test case for expression switch

! test/langtools/lib/combo/tools/javac/combo/JavacTemplateTestBase.java
+ test/langtools/tools/javac/expswitch/ExpSwitchNestingTest.java
+ test/langtools/tools/javac/expswitch/TEST.properties