Fix IC with daemon

JPS IC with daemon was not working since
the commit 514635e965

Before that change `IncrementalCompilation.isEnabled`
returned `true` when the corresponding system property was not set.
After the change `isEnabled` returns `true` only if
the system property is set and equals to `"true"`.

The property was never set up for the daemon if `CompilerMode.JPS_COMPILER`
was used (the property was set up in a JPS process or in the daemon in case
it was used with Gradle).

     #KT-19414 fixed

compiler/incremental-compilation-impl/src/org/jetbrains/kotlin/incremental/IncrementalJvmCompilerRunner.kt

@@ -71,9 +71,9 @@ private object EmptyICReporter : ICReporter {
     }
 }
 
-inline fun <R> withIC(fn: ()->R): R {
+inline fun <R> withIC(enabled: Boolean = true, fn: ()->R): R {
     val isEnabledBackup = IncrementalCompilation.isEnabled()
-    IncrementalCompilation.setIsEnabled(true)
+    IncrementalCompilation.setIsEnabled(enabled)
 
     try {
         return fn()