plutil: explictly specify Swift.type to disambiguate

The CMake based build uncovered that swift can sometimes get confused about the
refernece to type in the interpolation.  Workaround it by specifying the
qualified name.  Thanks to Lily Vulcano for the hint!

Author: compnerd

Diff for: Tools/plutil/main.swift

@@ -202,7 +202,7 @@ extension Dictionary {
             if let key = $0.0 as? String {
                 key.display(indent + 1, type: .key)
             } else {
-                fatalError("plists should have strings as keys but got a \(type(of: $0.0))")
+                fatalError("plists should have strings as keys but got a \(Swift.type(of: $0.0))")
             }
             print(" => ", terminator: "")
             displayPlist($0.1, indent: indent + 1, type: .value)
@@ -302,7 +302,7 @@ func displayPlist(_ plist: Any, indent: Int = 0, type: DisplayType = .primary) {
     case let val as NSData:
         val.display(indent, type: type)
     default:
-        fatalError("unhandled type \(type(of: plist))")
+        fatalError("unhandled type \(Swift.type(of: plist))")
     }
 }