neomake shellcheck

let g:neomake_sh_shellcheck_maker = {
        \ 'args': ['-fgcc', '-e', 'SC2034,SC2148,SC2164,SC2086,SC2154'],
        \ 'errorformat':
            \ '%f:%l:%c: %trror: %m,' .
            \ '%f:%l:%c: %tarning: %m,' .
            \ '%I%f:%l:%c: note: %m',
    \ }