Fix cpp11_lambda_functions and rname to use fn1 instead of fn, since fn is a reserved word as of PHP 7.4.
git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@12372 626c5289-ae23-0410-ae9c-e8d60b6d4f22
git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk/SWIG@6705 626c5289-ae23-0410-ae9c-e8d60b6d4f22