libcap: fix cross-compilation support
libcap: fix cross-compilation support

Between libcap 2.51 and 2.52, the CROSS_COMPILE flag appears in more places.
Maybe it was already required before, but now the build fails due to it not being set.

Set it unconditionally.

NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs