ale/test/command_callback/test_glslang_command_callback.vader

Before:
  call ale#assert#SetUpLinterTest('glsl', 'glslang')

After:
  call ale#assert#TearDownLinterTest()

Execute(The default command should be correct):
  AssertLinter 'glslangValidator', ale#Escape('glslangValidator') . ' -C %t'

Execute(The executable should be configurable):
  let b:ale_glsl_glslang_executable = 'foobar'

  AssertLinter 'foobar', ale#Escape('foobar') . ' -C %t'

Execute(Options should work):
  let g:ale_glsl_glslang_options = '--test'

  AssertLinter 'glslangValidator',
  \ ale#Escape('glslangValidator') . ' --test -C %t'