[bind10-dev] unit tests and include symlink tree

[Jeremy C. Reed]

See data.h

http://bind10.isc.org/~tester/20100205191051-740/coverage/src/lib/cc/cpp/index.html
and
http://bind10.isc.org/~tester/20100205191051-740/coverage/include/cc/index.html

This is the same file. But the symlink version got 100% coverage and the 
real one (target of symlink) only 57%.

The reverse is exceptions.h:

http://bind10.isc.org/~tester/20100205191051-740/coverage/include/exceptions/index.html
and
http://bind10.isc.org/~tester/20100205191051-740/coverage/src/lib/exceptions/cpp/index.html

In this case the included symlink got 70% coverage and the real one got 
100% coverage.

It appears that some unit tests are using the headers from the src tree 
while others are using the include tree.

I was going to remove include from the lcov report, but then realize it 
was inconsistent and the results would be wrong. I suggest we don't use 
the include symlink tree for the gtest tests.