misc pkgs: Manual fixup pkgconfig nativeBuildInputs after sed

Importantly, this included regenerating pkgs/servers/x11/xorg, to
clobber the old sed.

pkgs/development/interpreters/erlang/generic-builder.nix

@@ -47,10 +47,9 @@ in stdenv.mkDerivation ({
 
   inherit src version;
 
-  nativeBuildInputs = [ autoreconfHook makeWrapper perl ];
+  nativeBuildInputs = [ autoreconfHook makeWrapper perl gnum4 libxslt libxml2 ];
 
-  nativeBuildInputs = [ autoreconfHook ];
-  buildInputs = [ gnum4 ncurses openssl libxslt libxml2 ]
+  buildInputs = [ ncurses openssl ]
     ++ optionals wxSupport wxPackages2
     ++ optionals odbcSupport odbcPackages
     ++ optionals javacSupport javacPackages

pkgs/development/interpreters/pixie/default.nix

@@ -32,9 +32,8 @@ let
   build = {flags, target}: stdenv.mkDerivation rec {
     name = "pixie-${version}";
     version = "0-r${commit-count}-${variant}";
-    nativeBuildInputs = libs;
-  nativeBuildInputs = [ pkgconfig ];
-    buildInputs = [ makeWrapper ];
+    nativeBuildInputs = [ makeWrapper pkgconfig ];
+    buildInputs = libs;
     PYTHON = if buildWithPypy
       then "${pypy}/pypy-c/.pypy-c-wrapped"
       else "${python2.interpreter}";

pkgs/development/interpreters/spidermonkey/1.8.5.nix

@@ -11,9 +11,8 @@ stdenv.mkDerivation rec {
 
   propagatedBuildInputs = [ nspr ];
 
-  nativeBuildInputs = [ pkgconfig ];
+  nativeBuildInputs = [ pkgconfig ] ++ lib.optional stdenv.isArm autoconf213;
   buildInputs = [ perl python2 zip ];
-  nativeBuildInputs = if stdenv.isArm then [ autoconf213 ] else [];
 
   postUnpack = "sourceRoot=\${sourceRoot}/js/src";