Windows: Added Mesos tests to the build helper.
Windows: Added Mesos tests to the build helper.

This adds an extra step to `support/windows-build.bat` to run the
Mesos tests after building them.

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