Add spec for struct-by-value
Add spec for struct-by-value

ffi/ffi,ferventcoder/ffi,ffi/ffi,majioa/ffi,tduehr/ffi,mvz/ffi,sparkchaser/ffi,MikaelSmith/ffi,ferventcoder/ffi,sparkchaser/ffi,tduehr/ffi,sparkchaser/ffi,majioa/ffi,tduehr/ffi,mvz/ffi,MikaelSmith/ffi,ferventcoder/ffi,MikaelSmith/ffi,yghannam/ffi,tduehr/ffi,majioa/ffi,yghannam/ffi,yghannam/ffi,ferventcoder/ffi,sparkchaser/ffi,ffi/ffi,majioa/ffi,mvz/ffi,yghannam/ffi,MikaelSmith/ffi,mvz/ffi,yghannam/ffi