Mesos: Corrected style of Makefiles.
Mesos: Corrected style of Makefiles.

This is not a full standartization of Makefile format, however, it is
a step towards consistency. This patch focuses mainly on the order of
files and corrects obvious issues. These are guidelines behind the
change:

- Files in the same folder should appear in lexicographical order.
- Subfolders should appear in lexicographical order either after files
or mixed with them (depending on the current consensus in the file).
- Though tabs are preferred, spaces are not replaced if they are
current consensus in the file or current section.

Review: https://reviews.apache.org/r/40011

Gilbert88/mesos,reneploetz/mesos,dforsyth/mesos,reneploetz/mesos,chhsia0/mesos,asamerh4/mesos,Gilbert88/mesos,zmalik/mesos,reneploetz/mesos,yuquanshan/customizedMesos,andschwa/mesos,gsantovena/mesos,reneploetz/mesos,chhsia0/mesos,craimbert/mesos,kaysoky/mesos,kaysoky/mesos,Gilbert88/mesos,craimbert/mesos,dforsyth/mesos,jpeach/mesos,verizonlabs/mesos,zmalik/mesos,Aman-Jain-14/customizedMesos,Aman-Jain-14/customizedMesos,chhsia0/mesos,dforsyth/mesos,andschwa/mesos,gsantovena/mesos,jpeach/mesos,chhsia0/mesos,verizonlabs/mesos,craimbert/mesos,Gilbert88/mesos,neilconway/mesos,Aman-Jain-14/customizedMesos,craimbert/mesos,jpeach/mesos,gsantovena/mesos,asamerh4/mesos,kaysoky/mesos,andschwa/mesos,Gilbert88/mesos,zmalik/mesos,verizonlabs/mesos,kaysoky/mesos,yuquanshan/customizedMesos,gsantovena/mesos,neilconway/mesos,zmalik/mesos,reneploetz/mesos,craimbert/mesos,yuquanshan/customizedMesos,verizonlabs/mesos,neilconway/mesos,reneploetz/mesos,jpeach/mesos,yuquanshan/customizedMesos,reneploetz/mesos,kaysoky/mesos,jpeach/mesos,jpeach/mesos,andschwa/mesos,zmalik/mesos,Aman-Jain-14/customizedMesos,yuquanshan/customizedMesos,verizonlabs/mesos,verizonlabs/mesos,asamerh4/mesos,neilconway/mesos,neilconway/mesos,gsantovena/mesos,craimbert/mesos,abudnik/mesos,kaysoky/mesos,zmalik/mesos,asamerh4/mesos,abudnik/mesos,andschwa/mesos,verizonlabs/mesos,craimbert/mesos,dforsyth/mesos,neilconway/mesos,abudnik/mesos,kaysoky/mesos,Aman-Jain-14/customizedMesos,abudnik/mesos,abudnik/mesos,chhsia0/mesos,dforsyth/mesos,dforsyth/mesos,Aman-Jain-14/customizedMesos,abudnik/mesos,jpeach/mesos,asamerh4/mesos,andschwa/mesos,Gilbert88/mesos,chhsia0/mesos,gsantovena/mesos,yuquanshan/customizedMesos,Aman-Jain-14/customizedMesos,andschwa/mesos,gsantovena/mesos,dforsyth/mesos,chhsia0/mesos,asamerh4/mesos,abudnik/mesos,Gilbert88/mesos,neilconway/mesos,asamerh4/mesos,yuquanshan/customizedMesos,zmalik/mesos