Add JaCoCo 0.8.1 to aggregation feature.

Bug: 532731
Change-Id: Ifeceeb45cf00b0a4d121b59154d173e7cf4772aa
diff --git a/releng/aggregationfeature/feature.xml b/releng/aggregationfeature/feature.xml
index fe22e38..4ec23d0 100644
--- a/releng/aggregationfeature/feature.xml
+++ b/releng/aggregationfeature/feature.xml
@@ -163,6 +163,10 @@
   <plugin id="org.jacoco.core" version="0.7.9.qualifier"/>
   <plugin id="org.jacoco.report" version="0.7.9.qualifier"/>
 
+  <plugin id="org.jacoco.agent" version="0.8.1.qualifier"/>
+  <plugin id="org.jacoco.core" version="0.8.1.qualifier"/>
+  <plugin id="org.jacoco.report" version="0.8.1.qualifier"/>
+
   <plugin id="org.jcodings" version="1.0.18.qualifier"/>
   <plugin id="org.joni" version="2.1.11.qualifier"/>