No longer call the script snippet LinuxX86Env.Set.sh,
MacOSXX86Env.Set.sh, etc, but always Env.Host.sh. No need for
source_soenv.sh then, which wouldn't have worked when cross-compiling
anyway.
(As before, when cross-compiling, the environment script snipppet for
the BUILD platform is called Env.Build.sh.)
gbuild allow for multiple 'module' to be build as one Makefile.
This help with parallelism.
This module build all the 'tail' end module. these that are not
dependencies or other dmake-based module, and that pseudo module
is declared as a dependency of postprocess instead of the individual
modules it 'group'
