[CMake] CREATE_TEST_SOURCELIST with mutliple includes

[Luke Bloy]

Hi,

I'm currently using

CREATE_TEST_SOURCELIST(Tests ${KIT}CxxTests.cxx
   ${TestSourceFiles}
   EXTRA_INCLUDE header1.h
   EXTRA_INCLUDE header2.h
)

to genereate a test executable. I'd like to replace this with a call 
something like

CREATE_TEST_SOURCELIST(Tests ${KIT}CxxTests.cxx
   ${TestSourceFiles}
   EXTRA_INCLUDES ${SOURCE_HEADERS}
)

is this possible? I tried, unsuccessfully, to find the 
CREATE_TEST_SOURCELIST macro, to see if modifying it would work.but I am 
open to suggestions.

My ultimate goal is to improve code coverage of my project. I've found 
that lcov (and gcov) only generate results for files included in an 
executable. So i'd like to force all the headers in my project into to 
the Test executable, so complete coverage reports are generated 
automaticcaly. That way i can catch developers who add headers without 
providing any tests.

Thanks for a great build system, and for any suggestions.

Luke