Implement extra variables for debugger

idea/testData/debugger/tinyApp/outs/evPropertyRefExpr.out

@@ -0,0 +1,29 @@
+LineBreakpoint created at evPropertyRefExpr.kt:8
+!JDK_HOME!\bin\java -agentlib:jdwp=transport=dt_socket,address=!HOST_NAME!:!HOST_PORT!,suspend=y,server=n -Dfile.encoding=!FILE_ENCODING! -classpath !APP_PATH!\classes;!KOTLIN_RUNTIME!;!CUSTOM_LIBRARY!;!RT_JAR! evPropertyRefExpr.EvPropertyRefExprPackage
+Connected to the target VM, address: '!HOST_NAME!:PORT_NAME!', transport: 'socket'
+evPropertyRefExpr.kt:8
+package evPropertyRefExpr
+
+class A {
+    var prop = 1
+
+    fun test() {
+        //Breakpoint!
+        if (prop == 1) {
+
+        }
+    }
+}
+
+fun main(args: Array<String>) {
+    A().test()
+}
+
+// PRINT_FRAME
+ frame    = test():8, A {evPropertyRefExpr}
+   this     = this = {evPropertyRefExpr.A@uniqueID}
+     field    = prop: int = 1 (sp = evPropertyRefExpr.kt, 4)
+   extra    = prop
+Disconnected from the target VM, address: '!HOST_NAME!:PORT_NAME!', transport: 'socket'
+
+Process finished with exit code 0