Add crashing test

Author: andrewbranch

tests/cases/compiler/noImplicitAnyLoopCrash.ts

@@ -0,0 +1,5 @@
+// @noImplicitAny: true
+let foo = () => {};     // if you remove or change foo definition to not a function, bug disappears
+let bar;                // if you add type annotation here, bug disappears
+while (1)               // if you remove while, bug disappears
+    bar = ~foo(...bar); // if you remove unary or spread operator, bug disappears