Added fibonacci example

tests/examples_test.go

@@ -12,6 +12,7 @@ var examples = []struct {
 }{
 	{"hello", "", 0},
 	{"write", "ELF", 0},
+	{"fibonacci", "", 55},
 }
 
 func TestExamples(t *testing.T) {

tests/programs/parameters.q

@@ -0,0 +1,12 @@
+main() {
+	syscall(60, f(1))
+}
+
+f(x) {
+	y := g()
+	return x + y
+}
+
+g() {
+	return 2
+}

tests/programs_test.go

@@ -21,6 +21,7 @@ var programs = []struct {
 	{"square-sum.q", "", 25},
 	{"chained-calls.q", "", 9},
 	{"nested-calls.q", "", 4},
+	{"parameters.q", "", 3},
 	{"return.q", "", 6},
 	{"reassign.q", "", 2},
 	{"branch.q", "", 0},