automate mains test more

move sources and include exit code and stdout in filename

test/mains/source/adds__10.rb

@@ -0,0 +1,7 @@
+a = 0
+b = 20
+while( a < b )
+  a = a + 1
+  b = b - 1
+end
+return a

test/mains/source/fibo__8.rb

@@ -0,0 +1,11 @@
+n = 6
+a = 0
+b = 1
+i = 1
+while( i < n )
+  result = a + b
+  a = b
+  b = result
+  i = i + 1
+end
+return result

test/mains/source/puts_Hello-there_11.rb

@@ -0,0 +1 @@
+return "Hello-there".putstring

test/mains/source/subs__0.rb

@@ -0,0 +1,5 @@
+b = 10
+while( b >= 1 )
+  b = b - 1
+end
+return b