Add flag `CPPUTEST_USE_GCOV_NO_GCNO_FILES` to prevent .gcno files from being generated.
Add flag `CPPUTEST_USE_GCOV_NO_GCNO_FILES` to prevent .gcno files from being generated.

This is useful if comparing .gcda files generated during UT run to files built during normal build stage, rather than files built during UT

offa/cpputest,basvodde/cpputest,cpputest/cpputest,cpputest/cpputest,basvodde/cpputest,basvodde/cpputest,cpputest/cpputest,cpputest/cpputest,basvodde/cpputest,offa/cpputest,offa/cpputest,offa/cpputest