hg: jdk/jdk: 8240980: Backout JDK-8240261

[weijun.wang at oracle.com]

Changeset: 29edf1cb3c02
Author:    weijun
Date:      2020-03-13 17:45 +0800
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/29edf1cb3c02

8240980: Backout JDK-8240261
Reviewed-by: dholmes

! 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