[test] Update test/IDE/complete_from_stdlib.swift to accomodate for stdlib difference in swift-3 branch.

Author: akyrtzi

test/IDE/complete_from_stdlib.swift

@@ -106,7 +106,7 @@ func protocolExtCollection2<C : Collection where C.Index : BidirectionalIndex>(_
 // PRIVATE_NOMINAL_MEMBERS_3: Begin completions
 // PRIVATE_NOMINAL_MEMBERS_3-DAG: Decl[InstanceMethod]/Super:         map({#(transform): (C.Iterator.Element) throws -> T##(C.Iterator.Element) throws -> T#})[' rethrows'][#[T]#]{{; name=.+}}
 // PRIVATE_NOMINAL_MEMBERS_3-DAG: Decl[InstanceVar]/Super:            lazy[#LazySequence<Collection>#]{{; name=.+}}
-// PRIVATE_NOMINAL_MEMBERS_3-DAG: index({#where: (C.Iterator.Element) throws -> Bool##(C.Iterator.Element) throws -> Bool#})[' rethrows'][#Comparable?#]{{; name=.+}}
+// PRIVATE_NOMINAL_MEMBERS_3-DAG: index({#where: (C.Iterator.Element) throws -> Bool##(C.Iterator.Element) throws -> Bool#})[' rethrows'][#C.Index?#]{{; name=.+}}
 // PRIVATE_NOMINAL_MEMBERS_3: End completions
 // NEGATIVE_PRIVATE_NOMINAL_MEMBERS_3-NOT: Decl{{.*}}:         index({#({{.*}}): Self.Iterator.Element