tools/console: have one Makefile per program/directory

tools/console: have one Makefile per program/directory

Sources of both xenconsoled and xenconsole are already separated into
different directory and don't share anything in common. Having two
different Makefile means it's easier to deal with *FLAGS.

Some common changes:
Rename $(BIN) to $(TARGETS), this will be useful later.
Stop removing *.so *.rpm *.a as they aren't created here.
Use $(OBJS-y) to list objects.
Update $(CFLAGS) for the directory rather than a single object.

daemon:
    Remove the need for $(LDLIBS_xenconsoled), use $(LDLIBS) instead.
    Remove the need for $(CONSOLE_CFLAGS-y) and use $(CFLAGS-y)
	instead.

client:
    Remove the unused $(LDLIBS_xenconsole)

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Luca Fancellu <luca.fancellu@arm.com>