Add Build Failed message

Author: federicobucchi

Sources/Build/BuildDelegate.swift

@@ -1,7 +1,7 @@
 /*
  This source file is part of the Swift.org open source project
 
- Copyright (c) 2018 Apple Inc. and the Swift project authors
+ Copyright (c) 2018-2020 Apple Inc. and the Swift project authors
  Licensed under Apache License v2.0 with Runtime Library Exception
 
  See http://swift.org/LICENSE.txt for license information
@@ -396,6 +396,7 @@ public final class BuildDelegate: BuildSystemDelegate, SwiftCompilerOutputParser
 
     public func hadCommandFailure() {
         onCommmandFailure?()
+        print("\n\n * Build Failed!")
     }
 
     public func handleDiagnostic(_ diagnostic: SPMLLBuild.Diagnostic) {
@@ -573,9 +574,8 @@ fileprivate struct CommandTaskTracker {
             if (totalCount == finishedCount) {
                 let latestOutput: String? = latestFinishedText
                 latestFinishedText = """
-                    \(latestOutput ?? "")
-                    * Build Process Completed!
-                    * Generated Binaries: .build/
+                \(latestOutput ?? "")\n
+                * Build Completed!
                 """
             }
             break