Rename the custom class file attribute used for synthesized class info

Change-Id: Idce0a50247b8590b7fc0b4b3d2a4c43d0248f82e

src/main/java/com/android/tools/r8/synthesis/SyntheticMarker.java

diff --git a/src/main/java/com/android/tools/r8/synthesis/SyntheticMarker.java b/src/main/java/com/android/tools/r8/synthesis/SyntheticMarker.java
index b5fc30d..ffaad01 100644
--- a/src/main/java/com/android/tools/r8/synthesis/SyntheticMarker.java
+++ b/src/main/java/com/android/tools/r8/synthesis/SyntheticMarker.java
@@ -22,7 +22,8 @@
 
 public class SyntheticMarker {
 
-  private static final String SYNTHETIC_MARKER_ATTRIBUTE_TYPE_NAME = "R8SynthesizedClass";
+  private static final String SYNTHETIC_MARKER_ATTRIBUTE_TYPE_NAME =
+      "com.android.tools.r8.SynthesizedClass";
 
   public static Attribute getMarkerAttributePrototype() {
     return MarkerAttribute.PROTOTYPE;