hg: jdk/jdk: 8240261: Use make/templates/gpl-cp-header in FieldGen.java

[weijun.wang at oracle.com]

Changeset: a744cb5d03d6
Author:    weijun
Date:      2020-03-12 18:21 +0800
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/a744cb5d03d6

8240261: Use make/templates/gpl-cp-header in FieldGen.java
Reviewed-by: erikj

! make/gensrc/Gensrc-java.base.gmk
! make/jdk/src/classes/build/tools/intpoly/FieldGen.java
- make/jdk/src/classes/build/tools/intpoly/header.txt
+ make/jdk/src/classes/build/tools/util/Header.java