Merge pull request #129 from millenomi/foundationxml-5.1

[5.1] FoundationXML: Adoption

Author: benlangmuir

Sources/SourceKit/sourcekitd/CommentXML.swift

@@ -13,6 +13,10 @@
 import SKSupport
 import Foundation
 
+#if canImport(FoundationXML)
+import FoundationXML
+#endif
+
 enum CommentXMLError: Error {
   case noRootElement
 }