Version 2.2.51

Bug: 177337814
Bug: 175201530
Bug: 178045782
Change-Id: I2d11659e471dfb87e2b1ccc05a62e513c4b63e7f
diff --git a/src/main/java/com/android/tools/r8/Version.java b/src/main/java/com/android/tools/r8/Version.java
index be9b929..8dfbb32 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 = "2.2.50";
+  public static final String LABEL = "2.2.51";
 
   private Version() {
   }