Preparing to add a wrapper for system()
Preparing to add a wrapper for system()

- This commit adds an unmodified copy of system.c to sb2,
  it was taken from glibc-2.8.
- Next commit will introduce changes that integrate it to libsb2
  (some changes were needed)

madscientist42/scratchbox2,madscientist42/scratchbox2,h113331pp/scratchbox2,h113331pp/scratchbox2,lbt/scratchbox2,madscientist42/scratchbox2,BinChengfei/scratchbox2,OlegGirko/ldbox,lbt/scratchbox2,ldbox/ldbox,lbt/scratchbox2,OlegGirko/ldbox,h113331pp/scratchbox2,h113331pp/scratchbox2,OlegGirko/ldbox,BinChengfei/scratchbox2,h113331pp/scratchbox2,loganchien/scratchbox2,loganchien/scratchbox2,BinChengfei/scratchbox2,loganchien/scratchbox2,OlegGirko/ldbox,ldbox/ldbox,lbt/scratchbox2,BinChengfei/scratchbox2,ldbox/ldbox,madscientist42/scratchbox2,OlegGirko/ldbox,h113331pp/scratchbox2,loganchien/scratchbox2,OlegGirko/ldbox,lbt/scratchbox2,loganchien/scratchbox2,BinChengfei/scratchbox2,madscientist42/scratchbox2,ldbox/ldbox,ldbox/ldbox,BinChengfei/scratchbox2,madscientist42/scratchbox2,ldbox/ldbox,loganchien/scratchbox2