DO NOT BUILD TEST EXECUTABLES THAT ARE NOT NEEDED FOR PROFILING

We do not want to build, or run, test executables when building
with -fprofile-generate or -fprofile-use

Building executables is a waste of resources.  Running the executables
may interfere with profiling of other executables.

Also fix one ODR warning: same enum name but different values in
different compilation units.

Also fix -Wmaybe-uninitialized warnings.

Change-Id: Ieb074d415938c612a9ea40a3ea7214463cb52f36