packaging: Add mkMeson{Library,Executable}

and:
- move pkg-config out of mkMesonDerivation, for components that don't
  produce any executable code

src/libmain-c/package.nix

@@ -1,6 +1,6 @@
 { lib
 , stdenv
-, mkMesonDerivation
+, mkMesonLibrary
 
 , nix-util-c
 , nix-store
@@ -16,7 +16,7 @@ let
   inherit (lib) fileset;
 in
 
-mkMesonDerivation (finalAttrs: {
+mkMesonLibrary (finalAttrs: {
   pname = "nix-main-c";
   inherit version;
 
@@ -33,8 +33,6 @@ mkMesonDerivation (finalAttrs: {
     (fileset.fileFilter (file: file.hasExt "h") ./.)
   ];
 
-  outputs = [ "out" "dev" ];
-
   propagatedBuildInputs = [
     nix-util-c
     nix-store
@@ -57,10 +55,6 @@ mkMesonDerivation (finalAttrs: {
     LDFLAGS = "-fuse-ld=gold";
   };
 
-  separateDebugInfo = !stdenv.hostPlatform.isStatic;
-
-  hardeningDisable = lib.optional stdenv.hostPlatform.isStatic "pie";
-
   meta = {
     platforms = lib.platforms.unix ++ lib.platforms.windows;
   };