Fixed some alphabetical ordering issues in the mesos build files.
Fixed some alphabetical ordering issues in the mesos build files.

This was requested during review feedback on a separate change, see:
  https://reviews.apache.org/r/67987/

abudnik/mesos,Gilbert88/mesos,kaysoky/mesos,chhsia0/mesos,chhsia0/mesos,andschwa/mesos,reneploetz/mesos,reneploetz/mesos,kaysoky/mesos,dforsyth/mesos,jpeach/mesos,andschwa/mesos,gsantovena/mesos,reneploetz/mesos,gsantovena/mesos,chhsia0/mesos,dforsyth/mesos,jpeach/mesos,dforsyth/mesos,gsantovena/mesos,kaysoky/mesos,dforsyth/mesos,abudnik/mesos,Gilbert88/mesos,abudnik/mesos,kaysoky/mesos,kaysoky/mesos,kaysoky/mesos,dforsyth/mesos,kaysoky/mesos,jpeach/mesos,reneploetz/mesos,gsantovena/mesos,andschwa/mesos,abudnik/mesos,andschwa/mesos,chhsia0/mesos,Gilbert88/mesos,abudnik/mesos,gsantovena/mesos,jpeach/mesos,Gilbert88/mesos,jpeach/mesos,reneploetz/mesos,Gilbert88/mesos,jpeach/mesos,andschwa/mesos,jpeach/mesos,reneploetz/mesos,abudnik/mesos,reneploetz/mesos,Gilbert88/mesos,chhsia0/mesos,gsantovena/mesos,gsantovena/mesos,abudnik/mesos,dforsyth/mesos,Gilbert88/mesos,chhsia0/mesos,dforsyth/mesos,andschwa/mesos,andschwa/mesos,chhsia0/mesos