Swift: Add one last test case (and address a .expected change elsewhere).

Author: geoffw0

swift/ql/test/library-tests/dataflow/taint/core/conversions.swift

@@ -99,3 +99,11 @@ func testConversions() {
 	sink(arg: v3) // $ tainted=94
 	sink(arg: v3 as! MyParentClass) // $ tainted=94
 }
+
+var myCEnumConst : Int = 0
+typealias MyCEnumType = UInt32
+
+func testCEnum() {
+	sink(arg: MyCEnumType(myCEnumConst))
+	sink(arg: MyCEnumType(sourceInt())) // $ tainted=108
+}

swift/ql/test/library-tests/dataflow/taint/libraries/string.swift

@@ -589,7 +589,7 @@ func taintedThroughConversion() {
   sink(arg: String(describing: source())) // $ tainted=589
 
   sink(arg: Int("123")!)
-  sink(arg: Int(source2())!) // $ MISSING: tainted=592
+  sink(arg: Int(source2())!) // $ tainted=592
 }
 
 func untaintedFields() {