[test] Don't run still-crashing compiler_crashers under no-asserts builds.

Per discussion on the list. From now on, when you fix a compiler_crashers
test case, move it to compiler_crashers_fixed so that we get no-asserts and
ASan coverage.

Swift SVN r27055

validation-test/compiler_crashers_fixed/2213-llvm-smallptrsetimplbase-smallptrsetimplbase.swift

@@ -0,0 +1,17 @@
+// RUN: not %target-swift-frontend %s -parse
+
+// Distributed under the terms of the MIT license
+// Test case submitted to project by https://github.com/practicalswift (practicalswift)
+// Test case found by fuzzing
+
+func b<T.C) {
+struct S) -> T: NSObject {
+}
+func ^(m func a<d where g: C {
+")
+struct c {
+init(Any) {
+struct x: a {
+protocol A : e { func a<T
+}
+let start = A<S {