hg: jdk9/sandbox: 2 new changesets

[aleksey.shipilev at oracle.com]

Changeset: 23d2a8101f6a
Author:    shade
Date:      2015-11-16 13:04 +0300
URL:       http://hg.openjdk.java.net/jdk9/sandbox/rev/23d2a8101f6a

Merge


Changeset: 4b557d22f8ad
Author:    shade
Date:      2015-11-17 02:23 +0300
URL:       http://hg.openjdk.java.net/jdk9/sandbox/rev/4b557d22f8ad

Demote public -XstringConcat to hidden -XDstringConcat

! make/CompileJavaModules.gmk
! make/common/SetupJavaCompilers.gmk