jenkins: leaf-build: Always clean up out/target/product/*

* Otherwise for very big device families it might take up lots of space
  for no actual use

Change-Id: I51ee98afadf521442ddead6636c6215b198bf786
diff --git a/jenkins/leaf-build.sh b/jenkins/leaf-build.sh
index dd92956..2935e2c 100755
--- a/jenkins/leaf-build.sh
+++ b/jenkins/leaf-build.sh
@@ -275,6 +275,8 @@
 
 	if [ "$JENKINS_CLEAN" = true ]; then
 		rm -rf out
+	else
+		rm -rf out/target/product/*
 	fi
 	rm -f .msgid
 	rm -f leaf*.zip