Add code coverage measurement feature

The COVERAGE CMake option enables the code coverage features of the
compiler and adds additional targets for generating LCOV coverage info
files and HTML based coverage reports.
The feature is currently only supported by the GCC compiler.

Change-Id: I4481a9ac3c7a4b2d3a94d6cb26579b6bd14f3557
Signed-off-by: Imre Kis <imre.kis@arm.com>
2 files changed