[tor-bugs] #8587 [Tor]: Test for curve25519-donna-c64 usability is borken.

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#8587: Test for curve25519-donna-c64 usability is borken.
------------------------------+---------------------------------------------
 Reporter:  nickm             |          Owner:                    
     Type:  defect            |         Status:  new               
 Priority:  normal            |      Milestone:  Tor: 0.2.4.x-final
Component:  Tor               |        Version:                    
 Keywords:  tor-client build  |         Parent:                    
   Points:                    |   Actualpoints:                    
------------------------------+---------------------------------------------
 In #8753, weasel discovered that under some circumstances, we're building
 curve25519-donna-c64 on 32-bit operating systems.  It looks like our
 order-of-operations is busted in the testing code for whether 128-bit int
 ops work, and we hadn't noticed because our return-status boolean was
 inverted.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/8587>
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