soapybladerf: backport cmake < 3.5.0 fix

pkgs/by-name/so/soapybladerf/package.nix

@@ -2,6 +2,7 @@
   lib,
   stdenv,
   fetchFromGitHub,
+  fetchpatch,
   cmake,
   pkg-config,
   libbladeRF,
@@ -32,6 +33,13 @@ stdenv.mkDerivation {
     soapysdr
   ];
 
+  patches = [
+    (fetchpatch {
+      url = "https://github.com/pothosware/SoapyBladeRF/commit/f141b61624f24a56aa3bdf7b0cc61c9fa65c26a3.patch";
+      hash = "sha256-szqHbSAHiK0F83bxYnrblEBi/U7tpD0AXotYV1eTFxU=";
+    })
+  ];
+
   cmakeFlags = [ "-DSoapySDR_DIR=${soapysdr}/share/cmake/SoapySDR/" ];
 
   meta = with lib; {