hg: jdk9/dev: 8176509: Use pandoc for converting build readme to html

[magnus.ihse.bursie at oracle.com]

Changeset: cda60babd152
Author:    ihse
Date:      2017-03-13 14:01 +0100
URL:       http://hg.openjdk.java.net/jdk9/dev/rev/cda60babd152

8176509: Use pandoc for converting build readme to html
Reviewed-by: erikj

! README
- README-builds.html
- README-builds.md
! common/autoconf/basics.m4
! common/autoconf/generated-configure.sh
! common/autoconf/spec.gmk.in
- common/bin/update-build-readme.sh
+ common/doc/building.html
+ common/doc/building.md
! make/Main.gmk
+ make/UpdateBuildDocs.gmk