Correctly pass options to cpplint (#728)

* Fix option passing to cpplint

ale_linters/cpp/cpplint.vim

@@ -5,11 +5,15 @@ if !exists('g:ale_cpp_cpplint_options')
     let g:ale_cpp_cpplint_options = ''
 endif
 
+function! ale_linters#cpp#cpplint#GetCommand(buffer) abort
+    return 'cpplint ' . ale#Var(a:buffer, 'cpp_cpplint_options') . ' %s'
+endfunction
+
 call ale#linter#Define('cpp', {
 \   'name': 'cpplint',
 \   'output_stream': 'stderr',
 \   'executable': 'cpplint',
-\   'command': 'cpplint %s',
+\   'command_callback': 'ale_linters#cpp#cpplint#GetCommand',
 \   'callback': 'ale#handlers#cpplint#HandleCppLintFormat',
 \   'lint_file': 1,
 \})