Chore: Move message.xml to scripts/messages (#4501)

* Move message.xml to scripts/messages

Get rid of the top-level etc/ directory by moving its only contents: message.xml to scripts/messages

* Move message.xml to app_settings

* Remove unneeded inclusion in viewer_manifest.py

indra/newview/CMakeLists.txt

@@ -1664,7 +1664,7 @@ set(viewer_APPSETTINGS_FILES
     app_settings/toolbars.xml
     app_settings/trees.xml
     app_settings/viewerart.xml
-    ${CMAKE_SOURCE_DIR}/../etc/message.xml
+    app_settings/message.xml
     ${CMAKE_SOURCE_DIR}/../scripts/messages/message_template.msg
     packages-info.txt
     featuretable.txt
@@ -1758,7 +1758,7 @@ if (WINDOWS)
 
     set(COPY_INPUT_DEPENDENCIES
       # The following commented dependencies are determined at variably at build time. Can't do this here.
-      ${CMAKE_SOURCE_DIR}/../etc/message.xml
+      app_settings/message.xml
       ${CMAKE_SOURCE_DIR}/../scripts/messages/message_template.msg
       ${SHARED_LIB_STAGING_DIR}/openjp2.dll
       ${SHARED_LIB_STAGING_DIR}/llwebrtc.dll

indra/newview/viewer_manifest.py

@@ -63,7 +63,6 @@ class ViewerManifest(LLManifest):
     def construct(self):
         super(ViewerManifest, self).construct()
         self.path(src="../../scripts/messages/message_template.msg", dst="app_settings/message_template.msg")
-        self.path(src="../../etc/message.xml", dst="app_settings/message.xml")
 
         if self.is_packaging_viewer():
             with self.prefix(src_dst="app_settings"):