cups-kyocera (cups driver): call {pre,post}Install

Add `preInstall` and `postInstall` to the `installPhase` to
permit package overrides to add commands to the install phase.

Suggested by r-rmcgibbo bot in
https://github.com/NixOS/nixpkgs/pull/133537#issuecomment-897437621

pkgs/misc/cups/drivers/kyocera/default.nix

@@ -31,6 +31,8 @@ stdenv.mkDerivation {
   nativeBuildInputs = [ patchPpdFilesHook ];
 
   installPhase = ''
+    runHook preInstall
+
     tar -xvf ${platform}/Global/English.tar.gz
     install -Dm755 English/rastertokpsl $out/lib/cups/filter/rastertokpsl
     patchelf \
@@ -41,6 +43,8 @@ stdenv.mkDerivation {
     mkdir -p $out/share/cups/model/Kyocera
     cd English
     cp *.ppd $out/share/cups/model/Kyocera
+
+    runHook postInstall
   '';
 
   ppdFileCommands = [ "rastertokpsl" ];