generic animation sources are used under all platforms so put them in ADVANCED_CMN_SR...

generic animation sources are used under all platforms so put them in ADVANCED_CMN_SRC/HDR instead of listing them for each platform; this fixes double inclusion (and resulting link problems) of animateg.cpp in wxUniv builds

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@43102 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775