[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/1206-swift-parser-parseexpridentifier.swift

@@ -0,0 +1,22 @@
+// 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 k<g {
+enum k {
+func l
+var _ = l
+extension NSSet {
+struct c<e> {
+}
+func f<o>() -> (o, o -> o) -> o {
+o m o.j = {
+}
+func j<d {
+enum j {
+class j {
+func y((Any, j))(v: (Any, AnyObject)) {
+y(v)
+}