add EscapeAnalysis statistics under PrintOptoStatistics

we should dump the statistical counters in Compile::print_statistics() in the presence of -XX:+PrintOptoStatistics

EA statistics
1. Java Objects and its breakdowns (NoEscape/ArgEscape/GlobalEscape)
2. total time spend in EA

Scalar Replacement Statistics
1. no. of objects are scalar replaced.
2. no. of Monitor objects removed.
3. no. of GC barriers removed.
4. no. of memory barriers removed.