mincover tests, such as Int32_TestVectors seem to be too heavy on a compiler:

• compile might take minutes on evergreen hosts
• clang3 llvm is crashing when optimizations are not turned off.
• following line may appear during build:

src/mongo/unittest/unittest.h:363:5: note: variable tracking size limit exceeded with -fvar-tracking-assignments, retrying without

this ticket is to look for solution which would reduce compile time. Suggested options are:

• split test vectors into multiple smaller ones
• yank c++ primitives out of test vectors (e.g.: no boost::optional, and no std::vector)