build: Use dedicated resources for helper programs

Using a single resource file for all JS sources saves a couple of
build system instructions, but has some serious downsides:

 - bundling the entire shell code with the tools blows
   up their size unnecessarily

 - the tools are rebuilt unnecessarily for any shell
   code change

Autotools was painful enough to let this slip, but with meson we
don't have any excuses - using the actual dependencies speeds up
the build a tiny bit and reduces the tools' sizes from over 2M
to about 50k.

https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/192

js/js-resources.gresource.xml

@@ -9,8 +9,6 @@
     <file>gdm/realmd.js</file>
     <file>gdm/util.js</file>
 
-    <file>extensionPrefs/main.js</file>
-
     <file>misc/config.js</file>
     <file>misc/extensionUtils.js</file>
     <file>misc/fileUtils.js</file>
@@ -33,8 +31,6 @@
     <file>perf/core.js</file>
     <file>perf/hwtest.js</file>
 
-    <file>portalHelper/main.js</file>
-
     <file>ui/accessDialog.js</file>
     <file>ui/altTab.js</file>
     <file>ui/animation.js</file>

js/meson.build

@@ -6,3 +6,17 @@ js_resources = gnome.compile_resources(
   c_name: 'shell_js_resources',
   dependencies: [config_js]
 )
+
+portal_resources = gnome.compile_resources(
+  'portal-resources', 'portal-resources.gresource.xml',
+  source_dir: ['.', meson.current_build_dir()],
+  c_name: 'portal_js_resources',
+  dependencies: [config_js]
+)
+
+prefs_resources = gnome.compile_resources(
+  'prefs-resources', 'prefs-resources.gresource.xml',
+  source_dir: ['.', meson.current_build_dir()],
+  c_name: 'prefs_js_resources',
+  dependencies: [config_js]
+)

js/portal-resources.gresource.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<gresources>
+  <gresource prefix="/org/gnome/shell">
+    <file>misc/config.js</file>
+    <file>portalHelper/main.js</file>
+  </gresource>
+</gresources>

js/prefs-resources.gresource.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<gresources>
+  <gresource prefix="/org/gnome/shell">
+    <file>extensionPrefs/main.js</file>
+
+    <file>misc/config.js</file>
+    <file>misc/extensionUtils.js</file>
+    <file>misc/fileUtils.js</file>
+    <file>misc/params.js</file>
+  </gresource>
+</gresources>