actually compile should be on by default

(it is safer)

compiler/tests/org/jetbrains/jet/codegen/forTestCompile/ForTestCompileSomething.java

@@ -36,7 +36,7 @@ import java.util.jar.JarOutputStream;
  */
 abstract class ForTestCompileSomething {
 
-    public static final boolean ACTUALLY_COMPILE = "true".equals(System.getenv("kotlin.tests.actually.compile"));
+    public static final boolean ACTUALLY_COMPILE = !"false".equals(System.getenv("kotlin.tests.actually.compile"));
 
     @NotNull
     private final String jarName;