hg: jigsaw/m2: Implemented fine granular clean targets

[erik . joelsson]

Changeset: fd40d75f90ef
Author:    erikj
Date:      2014-10-16 16:35 +0200
URL:       http://hg.openjdk.java.net/jigsaw/m2/rev/fd40d75f90ef

Implemented fine granular clean targets

! make/Main.gmk
! make/MakeHelpers.gmk