Increase maven heap space

Change-Id: If59a992326477f3ee8716cf02a6b5eeda2690473
diff --git a/.mvn/jvm.config b/.mvn/jvm.config
index 33df7f7..2c3ff82 100644
--- a/.mvn/jvm.config
+++ b/.mvn/jvm.config
@@ -1 +1,2 @@
--Xss12m
+-Xss1g
+-Xmx8g