RFR: 8231214: PrintInlining should avoid intermixing of messages

[Jie Fu]

Hi all,

JBS:    https://bugs.openjdk.java.net/browse/JDK-8231214
Webrev: http://cr.openjdk.java.net/~jiefu/8231214/webrev.00/

When analyzing the inlining status of the compilation, the output of 
PrintInlining was found to be intermixed.
It might be better to dump the inlining messages together in one block.

Testing:
  - make test TEST="tier1" CONF=release   on Linux/x64
  - make test TEST="tier1" CONF=fastdebug on Linux/x64

Could you please review it and give me some advice?

Thanks a lot.
Best regards,
Jie