Ubuntu buildbot timing after -gmodules

Hi Pavel,

FYI -

I took a look at the ubuntu 14.04 x86_64 cmake buildbot before and after the -gmodules change landed, and it looks like the total runtime is up about 12%. (Now ~28 minutes, before ~25 minutes).

Doesn’t seem too bad for the scope of increased coverage.

That's good news. We probably have some reserves left in there due to
the scheduling of tests of different size.