debug testTraceDependency

Author: cachemeifyoucan

Tests/SwiftDriverTests/ExplicitModuleBuildTests.swift

@@ -2648,7 +2648,7 @@ final class ExplicitModuleBuildTests: XCTestCase {
       // Detailed explain (all possible paths)
       do {
         try assertDriverDiagnostics(args: [
-            "swiftc",
+            "swiftc", "-v",
             "-Xcc", "-Xclang", "-Xcc", "-fbuiltin-headers-in-system-modules",
             "-I", cHeadersPath.nativePathString(escaped: true),
             "-I", swiftModuleInterfacesPath.nativePathString(escaped: true),