Update builder so that it prints targets one-per-line as buildbot requires

diff --git a/builder b/builder
index 6176c5f68354ca82814ef20a4c87327785157ff3..b7d12ad7f67b058faf11d322ccdf510da9f9d5eb 160000 (submodule)
--- a/builder
+++ b/builder
@@ -1 +1 @@
-Subproject commit 6176c5f68354ca82814ef20a4c87327785157ff3
+Subproject commit b7d12ad7f67b058faf11d322ccdf510da9f9d5eb