Removed another unneeded file.
Started work on the assembler.

I added the as driver, and the i386-specific as executable.
Fixed a build-time bug.

When I tried to build cctools on its own (instead of from inside the larger Andromeda project), header-include paths would get mangled. This is now fixed.
Moved the assembler driver into its own subdirectory.
Added the i386-specific assembler to the build.