[ovs-git] [openvswitch/ovs] 1fdf0f: travis: Fix OSX build on travis

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/openvswitch/ovs
  Commit: 1fdf0f4b847c3d607c77e2f581d9fb8461e81087
      https://github.com/openvswitch/ovs/commit/1fdf0f4b847c3d607c77e2f581d9fb8461e81087
  Author: William Tu <u9012063 at gmail.com>
  Date:   2017-10-23 (Mon, 23 Oct 2017)

  Changed paths:
    M .travis/osx-prepare.sh

  Log Message:
  -----------
  travis: Fix OSX build on travis

Run "brew update" before any installs.
This yields a clean build:
	https://travis-ci.org/williamtu/ovs-travis/builds/291616874

Signed-off-by: William Tu <u9012063 at gmail.com>
Acked-by: Yi-Hung Wei <yihung.wei at gmail.com>
Signed-off-by: Gurucharan Shetty <guru at ovn.org>