ToBoolean is fixed with the latest core-js snapshot

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@9772 5f5364db-9458-4db8-a492-e30667be6df6
re tested an fixed for the latest IE11

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@9773 5f5364db-9458-4db8-a492-e30667be6df6