Add basic compilation tests from swift-compiler-crashes (https://github.com/practicalswift/swift-compiler-crashes.git)

Swift SVN r21693

validation-test/compiler_crashers/027-void-map-over-sequence.swift

@@ -0,0 +1,11 @@
+// RUN: %swift %s -emit-ir
+// Test case submitted to project by https://github.com/tmu (Teemu Kurppa)
+// rdar://18118173
+
+class a<T : Hashable> {
+    var b = [T : Bool]()
+    init<S : SequenceType where S.Generator.Element == T>(_ c: S) {
+        map(c) { self.b[$0] = true }
+    }
+}
+a([1])