Automatic resources: Fix tooling support

The files to be put into an auto-generated qrc file must not simply
disappear, because IDE users still need to have them in the project tree.
So we add them to OTHER_FILES now.

Task-number: QTCREATORBUG-20103
Task-number: QTCREATORBUG-20104
Change-Id: I8a9136491f975def7c33385e375c407815ad269a
Reviewed-by: hjk <hjk@qt.io>
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>

mkspecs/features/resources.prf

@@ -28,6 +28,7 @@ for(resource, RESOURCES) {
             !exists($$absolute_path($$resource, $$_PRO_FILE_PWD_)): \
                 warning("Failure to find: $$resource")
             qmake_immediate.files += $$resource
+            OTHER_FILES *= $$resource
         }
         RESOURCES -= $$resource
         next()
@@ -57,6 +58,7 @@ for(resource, RESOURCES) {
                 alias = $$relative_path($$file, $$abs_base)
                 resource_file_content += \
                     "<file alias=\"$$xml_escape($$alias)\">$$xml_escape($$file)</file>"
+                OTHER_FILES *= $$file
             }
         }