[Gradle Release Plugin] - pre tag commit: '0.8.1'.

Signed-off-by: Adrian Sutton <adrian.sutton@consensys.net>

gradle.properties

@@ -1,2 +1,2 @@
 org.gradle.jvmargs=-Xmx1g
-version=0.9.0-SNAPSHOT
+version=0.8.1

pantheon/src/main/java/tech/pegasys/pantheon/PantheonInfo.java

@@ -2,7 +2,7 @@ package tech.pegasys.pantheon;
 
 // This file is generated via a gradle task and should not be edited directly.
 public class PantheonInfo {
-  private static final String version = "pantheon/0.8.0-SNAPSHOT";
+  private static final String version = "pantheon/0.8.1";
 
   private PantheonInfo() {}