Avoid use of "long", and similar fixes for Win64 and X32.
This might be what is missing for Win64 in DES_BS_ASM.
Linux-X32: Add an SSE2-only build (for testing) and finally solve
the assembler problems after I warmed up with the Win64 stuff.
Also more cosmetical tweaks to the make target list. Oh, and we
rename the targets back to linux-X32 as opposed to linux-x86-X32.
This passes the Test Suite.