RFR: Merge remaining jdk11

[Roman Kennke]

Thanks!
I've pushed a minor release build fix after the fact. It was not
committed to the merge changeset when I pushed the main batch. Please
have a look at the concurrentHashMap issue ASAP.

Roman

> Ok!
> 
> Thanks,
> 
> -Zhengyu
> 
> On 06/08/2018 10:36 AM, Roman Kennke wrote:
>> This merges from jdk/jdk up to:
>>
>> changeset:   50805:ec70aad8aebe
>> user:        simonis
>> date:        Fri Jun 08 10:22:26 2018 +0200
>> summary:     8204335: [ppc] Assembler::add_const_optimized incorrect for
>> some inputs
>>
>>
>> There've only been smallish stuff, and a bunch of improvements that I
>> pushed to upstream meanwhile.
>>
>> Testing looks good, except that StringInternCleanup.java appears to
>> trigger a bug in concurrentHashMap when run from fastdebug. I hope
>> Zhengyu can look at that?
>>
>> List of changesets:
>> http://cr.openjdk.java.net/~rkennke/upstream-merge-2018-06-08/outgoing.txt
>>
>>
>> Ok?
>>
>> Roman
>>