RFR (S): 8011933: add number of classes, methods and time spent to CompileTheWorld

[Christian Thalinger]

http://cr.openjdk.java.net/~twisti/8011933

8011933: add number of classes, methods and time spent to CompileTheWorld
Reviewed-by:

Add some code to print some statistics with the done message: 

CompileTheWorld : Done (2 classes, 16 methods, 972 ms)

src/share/vm/classfile/classLoader.cpp
src/share/vm/classfile/classLoader.hpp