arrow-cpp: fix static and cross
Before this change it was running into:
```
error: infinite recursion encountered
at /home/tobim/n/nixpkgs/pkgs/stdenv/generic/make-derivation.nix:82:22:
81| # An infinite recursion here can be caused by having the attribute names of expression `e` in `.overrideAttrs(finalAttrs: previousAttrs: e)` depend on `finalAttrs`. Only the attribute values of `e` can depend on `finalAttrs`.
82| args = rattrs (args // { inherit finalPackage overrideAttrs; });
```
