Initial Spring 2016 commit.

userland/testbin/randcall/callspecs.txt

@@ -0,0 +1,26 @@
+2 execv		ptr	ptr
+2 waitpid	int	ptr	int
+2 open		ptr	int	int
+2 read		int	ptr	size
+2 write		int	ptr	size
+2 close		int
+5 ioctl		int	int	ptr
+2 lseek		int	off	int
+4 fsync		int
+4 ftruncate	int	off
+4 fstat		int	ptr
+4 remove	ptr
+4 rename	ptr	ptr
+5 link		ptr	ptr
+4 mkdir		ptr	int
+4 rmdir		ptr
+2 chdir		ptr
+4 getdirentry	int	ptr	size
+5 symlink	ptr	ptr
+5 readlink	ptr	ptr	size
+2 dup2		int	int
+5 pipe		ptr
+5 __time	ptr	ptr
+2 __getcwd	ptr	size
+5 stat		ptr	ptr
+5 lstat		ptr	ptr