Account for swift-driver checking all outputs.

Author: David Ungar

test/Driver/Dependencies/one-way-merge-module-fine.swift

@@ -11,6 +11,9 @@
 // CHECK-FIRST: Handled other.swift
 // CHECK-FIRST: Produced master.swiftmodule
 
+// swift-driver checks existence of all outputs
+// RUN: touch -t 201401240006 %t/{main,other}.swift{module,doc,sourceinfo}
+
 // RUN: cd %t && %swiftc_driver -driver-use-frontend-path "%{python.unquoted};%S/Inputs/update-dependencies.py;%swift-dependency-tool" -output-file-map %t/output.json -incremental -driver-always-rebuild-dependents ./main.swift ./other.swift -emit-module-path %t/master.swiftmodule -module-name main -j1 -v 2>&1 | %FileCheck -check-prefix=CHECK-SECOND %s
 
 // CHECK-SECOND-NOT: warning