[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/0264-isvalididentifiercontinuationcodepoint.swift

@@ -0,0 +1,18 @@
+// 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
+
+import Fou    init(b: c) {
+  ypealias E
+}
+struct B<T  typealias F = Int
+    func g<T where T.E == F>(f: B<T>) {
+    }
+}
+func b(c) -> <d>(() -> d) {
+}
+impoience ire : C)  c
+    }
+}