buildroot: Update to f462e06a

Jeremy Kerr (1):
      package/petitboot: Update to f2201e97

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
diff --git a/buildroot b/buildroot
index 3120591..f462e06 160000
--- a/buildroot
+++ b/buildroot
@@ -1 +1 @@
-Subproject commit 31205912fed95fa0edf1adc5d89dc78d7a068a29
+Subproject commit f462e06ab10035029f24d494d9936fcb8c6cf49a