incorporate 8l/ from latest plan9 source, it has elf support!

the default ken-cc does not have the elf generation part
 (but it's relatively easy to compile on mac and linux)

plan9 cc has it, but it generated a corrupted elf

go has it but has not the -l option and so always link with linux dynlinker
removed .svn
* .gitignore:
* modif-orig.txt: