hg: jdk/submit: 8210761: libjsig is being compiled without optimization

[sgehwolf at redhat.com]

Changeset: 4010c90156d1
Author:    sgehwolf
Date:      2018-09-21 16:58 +0200
URL:       http://hg.openjdk.java.net/jdk/submit/rev/4010c90156d1

8210761: libjsig is being compiled without optimization
Reviewed-by: erikj, ihse

! make/lib/Lib-java.base.gmk