turn test files in one function definition

lisc/test/max.ssa

@@ -5,20 +5,22 @@
 # b input array
 # a output max
 
-@start
-@loop
+function $test {
+ @start
+ @loop
 	%max =w phi @start -1, @new %byt, @old %max
 	%loc =l phi @start $b,  @new %loc1, @old %loc1
 	%byt =w loadub %loc
 	%loc1 =l add 1, %loc
 	jnz %byt, @iter, @end
-@iter
+ @iter
 	%cmp =w csle %max, %byt
 	jnz %cmp, @new, @old
-@new
+ @new
 	jmp @loop
-@old
+ @old
 	jmp @loop
-@end
+ @end
 	storew %max, $a
 	ret
+}