hg: amber/amber: Fix: javac fails to diagnose some unreachable cases in a pattern switch

[srikanth.adayapalam at oracle.com]

Changeset: 35b4e96ff926
Author:    sadayapalam
Date:      2017-10-25 09:21 +0530
URL:       http://hg.openjdk.java.net/amber/amber/rev/35b4e96ff926

Fix: javac fails to diagnose some unreachable cases in a pattern switch

! src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Flow.java
+ test/langtools/tools/javac/patterns/UnreachableCasesTest.java
+ test/langtools/tools/javac/patterns/UnreachableCasesTest.out