[patch] Fix bug of open's flags

[Lai Jiangshan]

Hi, all
    Syscall open's flag O_ASYNC is not defined in kernel src, but
FASYNC is defined. These two macros' value are same. But in current
tapset, function _sys_open_flag_str is just using the undefined
macro O_ASYNC, so the "O_ASYNC" will never appear in the return
value of _sys_open_flag_str.

I fixed it with the following patch.

--- /usr/share/systemtap/tapset/aux_syscalls.stp	2007-09-18 10:11:15.000000000 +0900
+++ tapset/aux_syscalls.stp	2007-09-18 10:17:00.000000000 +0900
@@ -984,6 +984,9 @@
 #ifdef O_ASYNC
 	if (flags & O_ASYNC)
 		strlcat (THIS->__retvalue, "|O_ASYNC", MAXSTRINGLEN);
+#elif defined(FASYNC)
+	if (flags & FASYNC)
+		strlcat (THIS->__retvalue, "|O_ASYNC", MAXSTRINGLEN);
 #endif
 #ifdef O_DIRECT
 	if (flags & O_DIRECT)