Log profiling data when tests have finished.

Log profiling data when tests have finished.

Previously, no profiling data was recorded from unit test runs.
That made it impossible to a) use unit tests for selective profiling
of individual functions, and b) made it impossibel to profile
the tests themselves.

This change fixes this problem by calling wfLogProfilingData()
after the test runner has finished.

Thaks to Hashar for some ideas, especially the fix in GlobalFunctions.

Change-Id: Iaa295115f3c4eb3b529388dcd953fe8932448b3e