Update RxJava ProGuard rules for v1.2.4 (#1)

Author: m-revetria

libraries/proguard-rx-java.pro

@@ -1,5 +1,13 @@
-# RxJava 0.21
-
+# RxJava 1.2.4
+ 		 
+-keepclassmembers class rx.internal.util.unsafe.*ArrayQueue*Field* {
+    long producerIndex;
+    long consumerIndex;
+}
+-keepclassmembers class rx.internal.util.unsafe.BaseLinkedQueueProducerNodeRef {
+    long producerNode;
+    long consumerNode;
+}
 -keep class rx.schedulers.Schedulers {
     public static <methods>;
 }