Version 2.2.57

Update the 2.2 branch to test with version 1.1.5 of the desugared
library.

Change-Id: I237e1691f187f09d154b88dff6072146f835a634
diff --git a/src/main/java/com/android/tools/r8/Version.java b/src/main/java/com/android/tools/r8/Version.java
index 9e6f6bc..479fe69 100644
--- a/src/main/java/com/android/tools/r8/Version.java
+++ b/src/main/java/com/android/tools/r8/Version.java
@@ -11,7 +11,7 @@
 
   // This field is accessed from release scripts using simple pattern matching.
   // Therefore, changing this field could break our release scripts.
-  public static final String LABEL = "2.2.56";
+  public static final String LABEL = "2.2.57";
 
   private Version() {
   }