Do not require host-python2

This should have been really merged into a previous commit, but I
screwed up.

Change-Id: Ib4810e1a969ee6a7ad26dba18e2632c6d2d2f391
diff --git a/submodules/buildroot b/submodules/buildroot
index 22f8658..66b16a2 160000
--- a/submodules/buildroot
+++ b/submodules/buildroot
@@ -1 +1 @@
-Subproject commit 22f86582534d83529f61c378183afe285bc8a6b2
+Subproject commit 66b16a2582bee7fc98c5fd2d9d1ee79a052a3a3f