RFR: JDK-8275865: Print deoptimization statistics in product builds [v2]

[Volker Simonis]

> Deoptimization statistics are already gathered in product builds but for some (probably historical) reasons aren't printed to the VM/Compiler log. These statics can be useful when analyzing the reasons for deoptimization and frequent recompilations.
> 
> Because the statistics are already collected anyway, printing them at VM-exit if either `-XX:+LogCompilation` or `-XX:+LogVMOutput` are set won't introduce any runtime overhead.

Volker Simonis has updated the pull request incrementally with one additional commit since the last revision:

  Fix C1 case which doesn't print deoptimization statistics

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/6103/files
  - new: https://git.openjdk.java.net/jdk/pull/6103/files/9b6bc6fe..42f01aed

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6103&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6103&range=00-01

  Stats: 5 lines in 1 file changed: 1 ins; 2 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6103.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6103/head:pull/6103

PR: https://git.openjdk.java.net/jdk/pull/6103