home-manager: minor attribute rename

The "activation-script" attribute doesn't actually point directly at
the activation script. Renamed the attribute to be more descriptive.

(cherry picked from commit b4fff6b9b7)

home-manager/default.nix

@@ -22,7 +22,7 @@ let
       };
     in
       {
-        inherit (env) activation-script;
+        inherit (env) activationPackage;
       }
   '';
 

home-manager/home-manager

@@ -67,7 +67,7 @@ function doBuild() {
               "@HOME_MANAGER_EXPR_PATH@" \
               --argstr confPath "$HOME_MANAGER_CONFIG" \
               --argstr confAttr "$HOME_MANAGER_CONFIG_ATTRIBUTE" \
-              -A activation-script
+              -A activationPackage
 }
 
 function doSwitch() {

modules/default.nix

@@ -78,6 +78,6 @@ in
 {
   inherit (module) options config;
 
-  activation-script = module.config.home.activationPackage;
+  activationPackage = module.config.home.activationPackage;
   home-path = module.config.home.path;
 }