Promote version 8.12.14-dev to 8.12.14.

Change-Id: If9b7f9b1d00740b701f76e1f7327d0d7b6802d86
diff --git a/src/main/java/com/android/tools/r8/Version.java b/src/main/java/com/android/tools/r8/Version.java
index 219d636..3763ee9 100644
--- a/src/main/java/com/android/tools/r8/Version.java
+++ b/src/main/java/com/android/tools/r8/Version.java
@@ -13,7 +13,7 @@
 
   // 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 = "8.12.14-dev";
+  public static final String LABEL = "8.12.14";
 
   private Version() {
   }