Php7 IIFE syntax parsing
Added parsing support for php7 iife syntax.
Reviewers: kfunk, KDevelop, mwolff
Reviewed By: KDevelop, mwolff
Subscribers: kdevelop-devel
Tags: KDevelop
BUG: 370515
Differential Revision: https://phabricator.kde.org/D4391
(cherry picked from commit 2bcdaa11f4d37b14cc0e016df9017224ca03f8d4)