hg: jdk8/build/langtools: 8000992: Update new build-infra makefiles

[kelly.ohair at oracle.com]

Changeset: 741cce355ba6
Author:    ohair
Date:      2012-10-26 14:25 -0700
URL:       http://hg.openjdk.java.net/jdk8/build/langtools/rev/741cce355ba6

8000992: Update new build-infra makefiles
Summary: Build-infra project integration. Multiple authors on this work: erikj and ihse primarily, also changes from ohair, tbell, and dholmes. Special credit to ohstrom for his smartjavac work.
Reviewed-by: erikj, ihse, dholmes, tbell

+ makefiles/BuildLangtools.gmk
! makefiles/Makefile