Fix typo that included CMAKE_C_FLAGS in CMAKE_CXX_FLAGS with coverage
Fix typo that included CMAKE_C_FLAGS in CMAKE_CXX_FLAGS with coverage

cgreen-devs/cgreen,thoni56/cgreen,thoni56/cgreen,thoni56/cgreen,cgreen-devs/cgreen,thoni56/cgreen,cgreen-devs/cgreen,cgreen-devs/cgreen,cgreen-devs/cgreen,thoni56/cgreen