Syscall numbers (on amd64 at least) are in unistd_{32,64}.h now so

update the recommended grep command to reflect that.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@11098 a5019735-40e9-0310-863c-91ae7b9d1cf9

Author: tom

README_MISSING_SYSCALL_OR_IOCTL

@@ -107,7 +107,7 @@ following:
 
 1.  Find out the name of the system call:
 
-       grep NNN /usr/include/asm/unistd.h
+       grep NNN /usr/include/asm/unistd*.h
 
     This should tell you something like  __NR_mysyscallname.
     Copy this entry to include/vki/vki-scnums-$(VG_PLATFORM).h.