guile: add effectiveVersion and site{Ccache,}Dir

pkgs/development/interpreters/guile/1.8.nix

···
 
   setupHook = ./setup-hook-1.8.sh;
 
+  passthru = {
+    effectiveVersion = lib.versions.majorMinor version;
+    siteCcacheDir = "lib/guile/site-ccache";
+    siteDir = "share/guile/site";
+  };
+
   meta = with lib; {
     homepage = "https://www.gnu.org/software/guile/";
     description = "Embeddable Scheme implementation";

pkgs/development/interpreters/guile/2.0.nix

···
 
   setupHook = ./setup-hook-2.0.sh;
 
+  passthru = rec {
+    effectiveVersion = lib.versions.majorMinor version;
+    siteCcacheDir = "lib/guile/${effectiveVersion}/site-ccache";
+    siteDir = "share/guile/site/${effectiveVersion}";
+  };
+
   meta = with lib; {
     homepage = "https://www.gnu.org/software/guile/";
     description = "Embeddable Scheme implementation";

pkgs/development/interpreters/guile/2.2.nix

···
 
   setupHook = ./setup-hook-2.2.sh;
 
+  passthru = rec {
+    effectiveVersion = lib.versions.majorMinor version;
+    siteCcacheDir = "lib/guile/${effectiveVersion}/site-ccache";
+    siteDir = "share/guile/site/${effectiveVersion}";
+  };
+
   meta = with lib; {
     homepage = "https://www.gnu.org/software/guile/";
     description = "Embeddable Scheme implementation";

pkgs/development/interpreters/guile/3.0.nix

···
 
   setupHook = ./setup-hook-3.0.sh;
 
-  passthru = {
+  passthru = rec {
+    effectiveVersion = lib.versions.majorMinor version;
+    siteCcacheDir = "lib/guile/${effectiveVersion}/site-ccache";
+    siteDir = "share/guile/site/${effectiveVersion}";
+
     updateScript = writeScript "update-guile-3" ''
       #!/usr/bin/env nix-shell
       #!nix-shell -i bash -p curl pcre common-updater-scripts