- place wmkdep and dirToString executables under
utilbin/$(WM_ARCH)$(WM_COMPILER).
This helps somewhat when copying rules about, and might help when creating
general rules.
- added rules for gcc-4.3 in preparation for switching to gcc-4.4
- added 'clean' target for wmake/src/Makefile
It is probably reasonable to separate the binaries from the rules (TODO)