[CMake] Coverage - Accumulating results

[Aaron_Wright at selinc.com]

What does it mean when my continuous build seems to process coverage just 
fine, but doesn't seem to get any results? I can use my own coverage tool 
and get results that are correct so the coverage build is working. I think 
I'm just missing a simple thing here. I get:

Performing coverage
   Processing coverage (each . represents one file):
    .................................................. processed: 50 out 
of 59
    .........
   Accumulating results (each . represents one file):

        Covered LOC:         0
        Not covered LOC:     0
        Total LOC:           0
        Percentage Coverage: 0.00%

So there's lots of files processed, and it does take a bit to do all that 
processing, but then I get nothing for results.
---------------------------------------------------------
Aaron Wright
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