hg: jdk7/build: 6914986: Make sure openjdk doc generation not turned off with JDK_UPDATE_VERSION

[ahughes at redhat.com]

Changeset: 432cbbdc44bc
Author:    andrew
Date:      2010-01-07 23:17 +0000
URL:       http://hg.openjdk.java.net/jdk7/build/rev/432cbbdc44bc

6914986: Make sure openjdk doc generation not turned off with JDK_UPDATE_VERSION
Summary: Only turn off documentation for updates when not building OpenJDK
Reviewed-by: ohair

! make/Defs-internal.gmk