MFH: r474381

Add devel/llvm40 as runtime dependency

Not bumping PORTREVISION because it is implicitly included by pkg qa scripts.

PR: 229274
Submitted by: Iblis Lin <iblis@hs.ntnu.edu.tw> (maintainer)
Reported by: Trond.Endrestol@ximalas.info

Approved by: ports-secteam (riggs)