libphosh: Include status-page-placeholder.h
PhoshStatusPagePlaceholder has bled into other publicly exported types from libphosh, so we need to make sure this is included. Elsewise libphosh-rs compile-time ABI tests fail, for example.
PhoshStatusPagePlaceholder has bled into other publicly exported types from libphosh, so we need to make sure this is included. Elsewise libphosh-rs compile-time ABI tests fail, for example.