Replace sysout by debug log in InliningOracle

Change-Id: Ia906c91a598e5894bf40d661c8070e84903d1629
diff --git a/src/main/java/com/android/tools/r8/ir/optimize/InliningOracle.java b/src/main/java/com/android/tools/r8/ir/optimize/InliningOracle.java
index 8b7a05e..1921cba 100644
--- a/src/main/java/com/android/tools/r8/ir/optimize/InliningOracle.java
+++ b/src/main/java/com/android/tools/r8/ir/optimize/InliningOracle.java
@@ -45,7 +45,7 @@
 
   void finish() {
     if (Log.ENABLED) {
-      System.out.println(info.toString());
+      Log.debug(getClass(), info.toString());
     }
   }