hg: jdk/jdk: 8227644: make more build-time variables available to Markdown files

[jonathan.gibbons at oracle.com]

Changeset: a33465cf8774
Author:    jjg
Date:      2019-07-12 15:15 -0700
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/a33465cf8774

8227644: make more build-time variables available to Markdown files
Reviewed-by: mchung

! make/Docs.gmk
! make/launcher/LauncherCommon.gmk