turn test files in one function definition

lisc/test/cup.ssa

@@ -1,10 +1,12 @@
 # counts up from -1988 to 1991
 
-@start
-@loop
+function $test {
+ @start
+ @loop
 	%n0  =l phi @start -1988, @loop %n1
 	%n1  =l add 1, %n0
 	%cmp =l csle 1991, %n1
 	jnz %cmp, @end, @loop
-@end
+ @end
 	ret
+}