Reviewed-by: ksrini

Reviewed-by: alanb, kvn, darcy

6987113: Remove SCCS logic from makefiles
Reviewed-by: mchung

Reviewed-by: darcy, weijun

Summary: Define new SUBDIRS_* variables for specifying components for one group
Reviewed-by: ohair

Summary: Add a new "modules" build target that builds jdk and jre module image
Reviewed-by: alanb, ohair

Reviewed-by: xdono, ohair

Reviewed-by: jjg, robilad, ohair