Add tests.

tests/mini/boolexp.d

@@ -0,0 +1,7 @@
+bool got() { return true; }
+extern(C) int printf(char*, ...);
+void main()
+{
+  bool b = true && got();
+  printf("%d\n", b ? 1 : 0);
+}

tests/mini/dottypeexp.d

@@ -0,0 +1,4 @@
+extern(C) int printf(char*, ...);
+template Foo() { void test() { printf("test\n"); typeof(this).whee(); } }
+class Bar { void whee() { printf("whee\n"); } mixin Foo!(); }
+void main() { (new Bar).test(); }