libarchive: Fix compilation on Tru64 with F_SETTIMES

The parent commit left a typo in the conditional code path for Tru64.
Add the missing '.'.

Utilities/cmlibarchive/libarchive/archive_write_disk_posix.c

@@ -2877,7 +2877,7 @@ set_time_tru64(int fd, int mode, const char *name,
 	tstamp.mtime.tv_nsec = mtime_nsec;
 	tstamp.ctime.tv_nsec = ctime_nsec;
 #else
-	tstamp.atimetv_usec = atime_nsec / 1000;
+	tstamp.atime.tv_usec = atime_nsec / 1000;
 	tstamp.mtime.tv_usec = mtime_nsec / 1000;
 	tstamp.ctime.tv_usec = ctime_nsec / 1000;
 #endif