DragonFlyBSD is not officially supported, but allowing it to work is straightforward at the moment so we'll allow it for now.
Fixes the following error when cross compiling: ``` --> freebsd/amd64 error: exit status 2 Stderr: # github.com/hashicorp/terraform/config/module config/module/inode.go:18: cannot use st.Ino (type uint32) as type uint64 in return argument ```
The syscall.Stat_t type doesn't exist on windows, so the inode lookup needs to be in a file with proper build constraints.