fix: release virtio-gpu from initfs

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

recipes/core/base-initfs/recipe.toml

@@ -76,6 +76,7 @@ cp -v "${COOKBOOK_SOURCE}/drivers/initfs.toml" "${COOKBOOK_BUILD}/initfs/lib/pci
 
 export CARGO_PROFILE_RELEASE_OPT_LEVEL=s
 export CARGO_PROFILE_RELEASE_PANIC=abort
+rm -rf "${CARGO_TARGET_DIR}"
 "${COOKBOOK_CARGO}" build ${build_flags} \
     --manifest-path "${COOKBOOK_SOURCE}/Cargo.toml" \
     $(for bin in "${BINS[@]}"; do echo "-p" "${bin}"; done)