Ignore macOS failures on Travis CI (#2345)
Ignore macOS failures on Travis CI (#2345)

Since the Travis CI OS X infrastructure is incredibly unstable,
we need to let the builds run on a best effort basis,
but not report failure and not hang a result until its finished.

With this setup, the Linux build dictates the success,
completely ignoring OS X.
JamesWTruher/PowerShell-1,daxian-dbw/PowerShell,PaulHigin/PowerShell,PaulHigin/PowerShell,TravisEz13/PowerShell,daxian-dbw/PowerShell,TravisEz13/PowerShell,daxian-dbw/PowerShell,JamesWTruher/PowerShell-1,PaulHigin/PowerShell,PaulHigin/PowerShell,JamesWTruher/PowerShell-1,JamesWTruher/PowerShell-1,TravisEz13/PowerShell,TravisEz13/PowerShell,daxian-dbw/PowerShell