renumber syscalls to get along with plan 9.

Reference: /n/patches.lsub.org/patch/syscallrenumb
Date: Tue Jul  3 18:04:41 CES 2012
Signed-off-by: quanstro@quanstro.net

--- /sys/src/libc/9syscall/sys.h	Thu Apr 12 12:26:16 2012
+++ /sys/src/libc/9syscall/sys.h	Tue Jul  3 17:07:17 2012
@@ -48,12 +48,12 @@
 #define	AWAIT		47
 #define	PREAD		50
 #define	PWRITE		51
-#define	SEMSLEEP	52
-#define	SEMWAKEUP	53
-#define	SEMALT		54
-#define	EXECAC		55
-#define	NIXSYSCALL	56
-#define	ZIOPREAD	57
-#define	ZIOPWRITE	58
-#define	ZIOFREE		59
-#define	TSEMACQUIRE	60
+#define	TSEMACQUIRE	52
+#define	SEMSLEEP	53
+#define	SEMWAKEUP	54
+#define	SEMALT		55
+#define	EXECAC		56
+#define	NIXSYSCALL	57
+#define	ZIOPREAD	58
+#define	ZIOPWRITE	59
+#define	ZIOFREE		60