Add --lz4 option for krill output

Change-Id: I99750a780bf0898b52fa0c2e83e587e89cbaa086
diff --git a/app/build.gradle b/app/build.gradle
index 52cc72c..97af808 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -47,6 +47,7 @@
     implementation 'org.apache.ant:ant:1.10.15'
     implementation 'org.apache.commons:commons-compress:1.28.0'
     implementation 'me.tongfei:progressbar:0.10.1'
+    implementation 'org.lz4:lz4-java:1.8.0'
 
     // Fix XML APIs conflict - force resolution to the non-relocated version
     implementation('xml-apis:xml-apis:1.0.b2') {