buildroot: Bump to pick up latest kexec-lite
kexec-lite has gained support for kexec_file_load. This is an alternate
method of loading a kexec payload that is required for secure boot and
kernel lockdown scenarios.
No behaviour is changed by this bump.
Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/buildroot b/buildroot
index fe30e21..17f1172 160000
--- a/buildroot
+++ b/buildroot
@@ -1 +1 @@
-Subproject commit fe30e2102946766db28f4c9aec049ca224a0becc
+Subproject commit 17f117295f545db5207c0a6ffd515035af0c4f49