Makefile: Fix sed command for OS X.
Makefile: Fix sed command for OS X.

erzel/vitess,tirsen/vitess,applift/vitess,dumbunny/vitess,applift/vitess,mattharden/vitess,applift/vitess,enisoc/vitess,mapbased/vitess,sougou/vitess,applift/vitess,davygeek/vitess,mahak/vitess,pivanof/vitess,HubSpot/vitess,HubSpot/vitess,mattharden/vitess,mapbased/vitess,dumbunny/vitess,applift/vitess,mattharden/vitess,vitessio/vitess,rnavarro/vitess,vitessio/vitess,HubSpot/vitess,mapbased/vitess,dcadevil/vitess,erzel/vitess,dumbunny/vitess,dcadevil/vitess,dumbunny/vitess,pivanof/vitess,davygeek/vitess,applift/vitess,dumbunny/vitess,erzel/vitess,mapbased/vitess,dcadevil/vitess,erzel/vitess,pivanof/vitess,mattharden/vitess,erzel/vitess,mapbased/vitess,tinyspeck/vitess,rnavarro/vitess,tirsen/vitess,mattharden/vitess,vitessio/vitess,vitessio/vitess,mapbased/vitess,mahak/vitess,alainjobart/vitess,pivanof/vitess,tinyspeck/vitess,davygeek/vitess,applift/vitess,erzel/vitess,tirsen/vitess,tirsen/vitess,mahak/vitess,sougou/vitess,alainjobart/vitess,rnavarro/vitess,erzel/vitess,erzel/vitess,sougou/vitess,erzel/vitess,sougou/vitess,mahak/vitess,alainjobart/vitess,sougou/vitess,HubSpot/vitess,dumbunny/vitess,pivanof/vitess,rnavarro/vitess,alainjobart/vitess,davygeek/vitess,mattharden/vitess,mattharden/vitess,tinyspeck/vitess,applift/vitess,dumbunny/vitess,mahak/vitess,dcadevil/vitess,tirsen/vitess,applift/vitess,mattharden/vitess,enisoc/vitess,tirsen/vitess,alainjobart/vitess,vitessio/vitess,alainjobart/vitess,tinyspeck/vitess,HubSpot/vitess,tinyspeck/vitess,mapbased/vitess,mahak/vitess,sougou/vitess,rnavarro/vitess,vitessio/vitess,tirsen/vitess,enisoc/vitess,mapbased/vitess,enisoc/vitess,tinyspeck/vitess,dumbunny/vitess,tirsen/vitess,applift/vitess,HubSpot/vitess,tinyspeck/vitess,alainjobart/vitess,HubSpot/vitess,dumbunny/vitess,dcadevil/vitess,dcadevil/vitess,rnavarro/vitess,dumbunny/vitess,mahak/vitess,alainjobart/vitess,rnavarro/vitess,davygeek/vitess,tirsen/vitess,enisoc/vitess,davygeek/vitess,rnavarro/vitess,mahak/vitess,sougou/vitess,pivanof/vitess,HubSpot/vitess,mattharden/vitess,pivanof/vitess,erzel/vitess,enisoc/vitess,enisoc/vitess,davygeek/vitess,mapbased/vitess,pivanof/vitess,vitessio/vitess,rnavarro/vitess,vitessio/vitess,mattharden/vitess,mapbased/vitess,sougou/vitess,pivanof/vitess,dcadevil/vitess