This commit allows to set which libraries to merge
and creates merged library in tail_build if enabled.
This should save time when loading libraries in application
and also makes more sense for link-time optimization.
Signed-off-by: Michael Meeks <michael.meeks@novell.com>
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'
