hg: jdk/sandbox: Bug fix from merge. Make ENABLE_JAVAC_SERVER be true/false, not yes/no.

[magnus.ihse.bursie at oracle.com]

Changeset: 2cab54729a2e
Author:    ihse
Date:      2020-03-12 22:39 +0100
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/2cab54729a2e

Bug fix from merge. Make ENABLE_JAVAC_SERVER be true/false, not yes/no.

! make/autoconf/build-performance.m4
! make/common/JavaCompilation.gmk
! make/common/SetupJavaCompilers.gmk