make: Drop unneeded HEXDUMP

We don't use it at all.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
make: pie -- Add util-net.c symlink

Instead of using weird makefile rule such as

	blob-util-net.o: $(SRC_DIR)/util-net.c

simply add a symlink for util-net.c thus we can
use same name in pie/ directory, which will allow
us to simplify makefile code.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
make: Add scripts/Makefile.rules

Suitable when needed to build rules with subdirectories.
We will use it alot for new make scheme.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
make: Use scripts/Makefile.rules

To eliminate code duplication.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
make: Add scripts/Make.build helper

This script contains of vatious helpers which
allow us to write makefiles in simplified way.
It will generate all rules needed for us.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
make: pie -- Switch to new build scheme

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
zdtm: make -- Add -f key on clean* ops

Otherwise if no such files present I'm getting warnings.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>