git: openjdk/amber: sealed-types: adding toString method to Flag.NON_SEALED

[Vicente Romero]

Changeset: 8e0e8e55
Author:    Vicente Romero <vicente.romero at oracle.com>
Date:      2020-04-23 15:55:45 +0000
URL:       https://git.openjdk.java.net/amber/commit/8e0e8e55

adding toString method to Flag.NON_SEALED

! src/jdk.compiler/share/classes/com/sun/tools/javac/code/Flags.java