Doesn't Build on Ubuntu 16.04

[Sha0]

Ubuntu 16.04 with 2016-06-20 Swift and 'swift build' yields:

Cloning https://github.com/PerfectlySoft/Perfect-mysqlclient-Linux.git HEAD is now at fff9275 Update Package.swift Resolved version: 0.3.0 warning: clang++ not found: this will cause build failure error: nonWhitelistedFlags("Non whitelisted flags found: ["-fabi-version=2", "-fno-omit-frame-pointer"] in pc file mysqlclient")