Allow PHP version check to execute on older version of PHP
Gerrit change 522014 (merged as b8b2514) mostly corrected this
issue, but one line was missed. Fixing that now.
Bug: T213893
Change-Id: I0a57f5902f1af2619fe47f7ee53695d3fd03adaf
(cherry picked from commit c92d559da3098c1f3a55df38cb34b4b22a06c130)