XSS sniff: rename $needsSanitizingFunctions
XSS sniff: rename $needsSanitizingFunctions

After ff82f067c979605864e5ec0bfb684c89d78731f7, this clarifies the
intent of this list.

jrfnl/WordPress-Coding-Standards,borkweb/WordPress-Coding-Standards,paulschreiber/WordPress-Coding-Standards,WordPress-Coding-Standards/WordPress-Coding-Standards,borkweb/WordPress-Coding-Standards,lkraav/WordPress-Coding-Standards,paulschreiber/WordPress-Coding-Standards,mattyrob/WordPress-Coding-Standards,jrfnl/WordPress-Coding-Standards,jrfnl/WordPress-Coding-Standards,jrfnl/WordPress-Coding-Standards,borkweb/WordPress-Coding-Standards,mediarain/WordPress-Coding-Standards,mattyrob/WordPress-Coding-Standards,xwp/WordPress-Coding-Standards,WordPress-Coding-Standards/WordPress-Coding-Standards,lkraav/WordPress-Coding-Standards,mattyrob/WordPress-Coding-Standards,WordPress-Coding-Standards/WordPress-Coding-Standards,paulschreiber/WordPress-Coding-Standards,mattyrob/WordPress-Coding-Standards,paulschreiber/WordPress-Coding-Standards,xwp/WordPress-Coding-Standards,WordPress-Coding-Standards/WordPress-Coding-Standards,xwp/WordPress-Coding-Standards,mattyrob/WordPress-Coding-Standards,xwp/WordPress-Coding-Standards,borkweb/WordPress-Coding-Standards,mediarain/WordPress-Coding-Standards