Alias sys_stime to sys_time

Since parsers for stime and time syscalls are identical,
replace sys_stime with an alias to sys_time.

* linux/dummy.h (sys_stime): Alias to sys_time.
* linux/syscall.h (sys_stime): Remove.
* time.c (sys_stime): Remove.
diff --git a/linux/dummy.h b/linux/dummy.h
index 7a8b17c..bf589ae 100644
--- a/linux/dummy.h
+++ b/linux/dummy.h
@@ -83,6 +83,7 @@
 #define	sys_setgid		sys_setuid
 #define	sys_setregid		sys_setreuid
 #define	sys_setresgid		sys_setresuid
+#define	sys_stime		sys_time
 #define	sys_swapoff		sys_chdir
 #define	sys_symlink		sys_link
 #define	sys_syncfs		sys_close