Name the target file on the swiftinterface verification job

This new diagnostic should distinguish between the verification of the
public and the private swiftitnerface

Author: xymus

Sources/SwiftDriver/Jobs/Job.swift

@@ -233,7 +233,7 @@ extension Job : CustomStringConvertible {
       return "Scanning dependencies for module \(moduleName)"
 
     case .verifyModuleInterface:
-      return "Verifying emitted module interface for module \(moduleName)"
+      return join("Verifying emitted module interface", displayInputs.first?.file.basename)
 
     case .generateAPIBaseline:
       return "Generating API baseline file for module \(moduleName)"