third_party: expose firmware and ucode targets

That way we don't have to redefine it with every target that does
any kind of takeover.

Change-Id: I816b42a87c755da7b42944b2768f71b53d8d77f3
Reviewed-on: https://review.monogon.dev/c/monogon/+/2929
Tested-by: Jenkins CI
Reviewed-by: Lorenz Brun <lorenz@monogon.tech>
diff --git a/cloud/agent/takeover/takeover.go b/cloud/agent/takeover/takeover.go
index d313174..ec7e416 100644
--- a/cloud/agent/takeover/takeover.go
+++ b/cloud/agent/takeover/takeover.go
@@ -41,7 +41,7 @@
 //go:embed third_party/linux/bzImage
 var kernel []byte
 
-//go:embed ucode.cpio
+//go:embed third_party/ucode.cpio
 var ucode []byte
 
 //go:embed initramfs.cpio.zst