Patch from Simon Peter <dn.tlp@gmx.net>:
* genmk.rb (Utility): Append $(#{src}_DEPENDENCIES) to #{obj} targets.
* conf/i386-pc.rmk: Replace grub-probe_DEPENDENCIES with
util/grub-probe.c_DEPENDENCIES. Replace grub-setup_DEPENDENCIES with
util/i386/pc/grub-setup.c_DEPENDENCIES.
* conf/i386-efi.rmk: Replace grub-probe_DEPENDENCIES with
util/grub-probe.c_DEPENDENCIES.
* conf/powerpc-ieee1275.rmk: Likewise.