struct is not binded which leads to undeclared identifier error
I am trying to use nimterop to create bindings to [libTomCrypt](https://github.com/libtom/libtomcrypt) and get this error
`Error: undeclared identifier: 'ltc_cipher_descriptor'`
with this code
```nim
import nimterop/[build, cimport]

const
    baseDir = getProjectCacheDir("libtomcrypt")
    gitURL = "https://github.com/libtom/libtomcrypt"

static:
    cDebug()
    gitPull(gitURL, baseDir)
    make(baseDir, "libtomcrypt.a", flags = "library")

cImport(baseDir & "/src/headers/tomcrypt.h", recurse = true, flags = "-E_ -F_")
```
ltc_cipher_descriptor is declared [here](https://github.com/libtom/libtomcrypt/blob/develop/src/headers/tomcrypt_cipher.h#L376)
Thanks in advance