Add support for GNUmakefile, where originally only Makefile was supported.
Not done everywhere, as some of the code involving makefiles is dead
anyway.
Signed-off-by: Jan Lindemann <jan@janware.com>
dev-utils.mk is meant to provide targets like install-to-system,
which will be invoked during development
Signed-off-by: Jan Lindemann <jan@janware.com>