treewide: move build helper to more fitting places

Change-Id: I3d0cfe9283222d403ae369ec9db09201ad511e15
Reviewed-on: https://review.monogon.dev/c/monogon/+/3327
Reviewed-by: Serge Bazanski <serge@monogon.tech>
Tested-by: Jenkins CI
diff --git a/osbase/tpm/proto/tpm.proto b/osbase/tpm/proto/tpm.proto
index e5455d2..fc70223 100644
--- a/osbase/tpm/proto/tpm.proto
+++ b/osbase/tpm/proto/tpm.proto
@@ -1,6 +1,6 @@
 syntax = "proto3";
 option go_package = "source.monogon.dev/osbase/tpm/proto";
-package metropolis.pkg.tpm;
+package osbase.pkg.tpm;
 
 import "proto/tpm/tpm.proto";