6368562 extra backslash in amd64 SYSCALL64 macro

[craig.mohr...@sun.com]

Author: craigm
Repository: /hg/onnv/onnv-gate
Revision: d234a309675e36a36ebb7ea077e5899d1b96f3ab
Log message:
6368562 extra backslash in amd64 SYSCALL64 macro

Files:
        update: usr/src/lib/libc/amd64/inc/SYS.h