Minor update to partial compilation seed message

Change-Id: I2aae5e710e26ebc3d3af0ace97e8470119acbf91
diff --git a/src/main/java/com/android/tools/r8/partial/R8PartialCompilationConfiguration.java b/src/main/java/com/android/tools/r8/partial/R8PartialCompilationConfiguration.java
index 20514e3..4c33c1f 100644
--- a/src/main/java/com/android/tools/r8/partial/R8PartialCompilationConfiguration.java
+++ b/src/main/java/com/android/tools/r8/partial/R8PartialCompilationConfiguration.java
@@ -143,7 +143,12 @@
     public Builder randomizeForTesting(long seed) {
       randomizeForTesting = new Random();
       randomizeForTesting.setSeed(seed);
-      System.out.println("Partial compilation seed: " + seed);
+      System.out.println(
+          "Partial compilation seed: "
+              + seed
+              + ". Use .setPartialCompilationSeed(parameters, "
+              + seed
+              + "L) to reproduce.");
       return this;
     }