Add ENABLE_TESTABILITY, as requested by Xcode 7.
Add ENABLE_TESTABILITY, as requested by Xcode 7.
jflinter/Dwifft,benzguo/Dwifft,papertigers/Dwifft,natestedman/Dwifft,benzguo/Dwifft,benzguo/Dwifft,papertigers/Dwifft,natestedman/Dwifft,jflinter/Dwifft,jflinter/Dwifft,natestedman/Dwifft