hg: jdk9/sandbox: 2 new changesets

[magnus.ihse.bursie at oracle.com]

Changeset: e1c9ea23079c
Author:    ihse
Date:      2017-03-21 11:09 +0100
URL:       http://hg.openjdk.java.net/jdk9/sandbox/rev/e1c9ea23079c

Add --toc to building.md.

! make/UpdateBuildDocs.gmk

Changeset: 86caa8df6b2a
Author:    ihse
Date:      2017-03-21 15:46 +0100
URL:       http://hg.openjdk.java.net/jdk9/sandbox/rev/86caa8df6b2a

Start from scratch on a brand-new readme.

! common/doc/building.html
! common/doc/building.md