Expose correct items in `os::fortanix_sgx::usercalls::alloc`
Expose correct items in `os::fortanix_sgx::usercalls::alloc`

graydon/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust