A final bit of script cleanup and caching

CI/before_script.msvc.sh

@@ -583,7 +583,7 @@ fi
 
 			echo Done.
 			printf "  Cleaning up extraneous data... "
-			rm -r "$(real_pwd)/Qt/"{Docs,Examples,Tools,vcredist,"MaintenanceTool.*"}
+			rm -r "$(real_pwd)/Qt/"{dist,Docs,Examples,Tools,vcredist,components.xml,MaintenanceTool.dat,MaintenanceTool.exe,MaintenanceTool.ini,network.xml,qt-install.qs}
 		fi
 
 		cd $QT_SDK

appveyor.yml

@@ -43,7 +43,8 @@ cache:
     - C:\projects\openmw\deps\ffmpeg-3.0.1-dev-win64.7z
     - C:\projects\openmw\deps\ffmpeg-3.0.1-win32.7z
     - C:\projects\openmw\deps\ffmpeg-3.0.1-win64.7z
-    - C:\projects\openmw\deps\qt-5-install.qs
+    - C:\projects\openmw\deps\OpenAL-Soft-1.17.2.zip
+    - C:\projects\openmw\deps\SDL2-2.0.4.zip
 
 clone_folder: C:\projects\openmw