treewide: cmake buildInputs to nativeBuildInputs, minor cleanups

pkgs/development/libraries/grpc/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch, cmake, zlib, c-ares, pkgconfig, openssl, protobuf
+{ stdenv, fetchFromGitHub, fetchpatch, cmake, zlib, c-ares, pkg-config, openssl, protobuf
 , gflags, abseil-cpp, libnsl
 }:
 
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
     })
   ];
 
-  nativeBuildInputs = [ cmake pkgconfig ];
+  nativeBuildInputs = [ cmake pkg-config ];
   buildInputs = [ zlib c-ares c-ares.cmake-config openssl protobuf gflags abseil-cpp ]
     ++ stdenv.lib.optionals stdenv.isLinux [ libnsl ];