Introduce experimental -Xuse-javac compilation mode

In this mode, javac AST and Symbol files are used during
Kotlin compilation instead of PSI / binary stuff.
Later, they are reused for Java file compilation.
javac in this mode is integrated into kotlinc.

compiler/testData/compileKotlinAgainstJava/SimpleAnnotation.java

@@ -0,0 +1,8 @@
+package test;
+
+import java.lang.annotation.*;
+
+@Target(value=ElementType.METHOD)
+public @interface SimpleAnnotation {
+    
+}