RFR: 8230877: Rename THREAD_LOCAL_DECL to thread_local

[Per Liden]

On 9/12/19 12:53 PM, David Holmes wrote:
[...]>> So, how about I dial this back a bit, and just rename
>> THREAD_LOCAL_DECL to THREAD_LOCAL, just to make it a bit less clunky? 
>> That doesn't give us all the benefits I originally had in mind, but 
>> given the constraints we have here I don't see any better alternatives.
>>
>> Updated webrev: http://cr.openjdk.java.net/~pliden/8230877/webrev.2
> 
> The rename to drop _DECL is fine and trivial.
> 
> Removing the USE_LIBRARY_BASED_TLS_ONLY guard makes it harder to test 
> with compiler-thread-local disabled. But not drastically so.
> 
> So I'm okay with this minor change.

Thanks David!

/Per