treewide: more fixes of phases after bash 4.3 -> 4.4

pkgs/applications/misc/pcmanx-gtk2/default.nix

···
 
   buildInputs = [ gtk2 libXft intltool automake115x autoconf libtool pkgconfig ];
 
-  preConfigurePhases = ''
+  preConfigure = ''
     ./autogen.sh
   '';
 

pkgs/misc/themes/orion/default.nix

···
 
   propagatedUserEnvPkgs = [ gtk-engine-murrine ];
 
-  phases = "$prePhases unpackPhase installPhase fixupPhase $postPhases";
   installPhase = ''
     mkdir -p $out/share/themes/orion
     cp -r gtk-2.0 gtk-3.0 metacity-1 openbox-3 xfwm4 $out/share/themes/orion

pkgs/tools/text/zimreader/default.nix

···
   enableParallelBuilding = true;
   buildInputs = [ automake autoconf libtool zimlib cxxtools tntnet ];
   setSourceRoot = "cd openzim-*/zimreader; export sourceRoot=`pwd`";
-  preConfigurePhases = [ "./autogen.sh" ];
+  preConfigure = "./autogen.sh";
 
   meta = {
     description = "A tool to serve ZIM files using HTTP";

pkgs/tools/text/zimwriterfs/default.nix

···
 
   buildInputs = [ automake autoconf libtool lzma pkgconfig zimlib file zlib ];
   setSourceRoot = "cd openzim-*/zimwriterfs; export sourceRoot=`pwd`";
-  preConfigurePhases = [ "./autogen.sh" ];
+  preConfigure = "./autogen.sh";
 
   meta = {
     description = "A console tool to create ZIM files";