Add USE_GCOV to CMakeLists.txt
Add USE_GCOV to CMakeLists.txt

Enable use of compiler --coverage option by passing -DUSE_GCOV=ON
to CMake (the default is OFF)

ngkaho1234/neovim-qt,0x90sled/neovim-qt,ngkaho1234/neovim-qt,equalsraf/neovim-qt,ravloony/neovim-qt,equalsraf/neovim-qt,Pireax/neovim-qt,ngkaho1234/neovim-qt,ravloony/neovim-qt,equalsraf/neovim-qt,ravloony/neovim-qt,Pireax/neovim-qt,equalsraf/neovim-qt,0x90sled/neovim-qt,0x90sled/neovim-qt,Pireax/neovim-qt