tests: Fix test for detecting generic specialization explosions.

The test worked but didn't test what it should test.

Author: eeckstein

test/SILOptimizer/generic_specialization_loops_detection_without_loops.swift

@@ -137,13 +137,13 @@ func flood2<T>(_ x: T) {
 @inline(never)
 public func run_TypeFlood(_ N: Int) {
   for _ in 1...N {
-    flood3(Some1<Some1<Some1<Int>>>())
-    flood3(Some1<Some1<Some0<Int>>>())
-    flood3(Some1<Some0<Some1<Int>>>())
-    flood3(Some1<Some0<Some0<Int>>>())
-    flood3(Some0<Some1<Some1<Int>>>())
-    flood3(Some0<Some1<Some0<Int>>>())
-    flood3(Some0<Some0<Some1<Int>>>())
-    flood3(Some0<Some0<Some0<Int>>>())
+    flood2(Some1<Some1<Some1<Int>>>())
+    flood2(Some1<Some1<Some0<Int>>>())
+    flood2(Some1<Some0<Some1<Int>>>())
+    flood2(Some1<Some0<Some0<Int>>>())
+    flood2(Some0<Some1<Some1<Int>>>())
+    flood2(Some0<Some1<Some0<Int>>>())
+    flood2(Some0<Some0<Some1<Int>>>())
+    flood2(Some0<Some0<Some0<Int>>>())
   }
 }