hg: jdk/sandbox: 8191715: Update documentation pointing to "common" directory

[chris.hegarty at oracle.com]

Changeset: fb62d4519338
Author:    ihse
Date:      2017-11-23 13:24 +0100
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/fb62d4519338

8191715: Update documentation pointing to "common" directory
Reviewed-by: erikj

! doc/building.html
! doc/building.md
! make/Init.gmk
! make/RunTests.gmk
! make/conf/jib-profiles.js