MFH: r431952

Fix ruby-qtruby with newer clang

Clang 4.0 trips on the bogus pointer comparison.
As the produced code may change, bump PORTREVISION.

PR: 216218
Reported by: jbeich
Approved by: rakuco (mentor)

PR: 216218
Approved by: ports-secteam (junovitch), rakuco (mentor)