[TypeChecker] Use the brace statement as the start location of a buildLimitedAvailability call
[TypeChecker] Use the brace statement as the start location of a buildLimitedAvailability call

Otherwise, the call to buildLimitedAvailability has a bigger source range than the brace statement that surrounds it, causing a verification failure.

apple/swift,roambotics/swift,benlangmuir/swift,JGiola/swift,apple/swift,glessard/swift,benlangmuir/swift,benlangmuir/swift,glessard/swift,roambotics/swift,glessard/swift,apple/swift,glessard/swift,apple/swift,roambotics/swift,roambotics/swift,JGiola/swift,roambotics/swift,glessard/swift,JGiola/swift,JGiola/swift,apple/swift,JGiola/swift,JGiola/swift,benlangmuir/swift,benlangmuir/swift,roambotics/swift,apple/swift,glessard/swift,benlangmuir/swift