Add the . and .. entries to glob()

os_scandir() and os_scandir_next() skip over those, because of the
unverlying libuv funcitons behaviour.

Fixes #2954

test/functional/eval/glob_spec.lua

@@ -0,0 +1,21 @@
+local helpers = require('test.functional.helpers')
+local clear, execute, eval, eq = helpers.clear, helpers.execute, helpers.eval, helpers.eq
+
+before_each(function()
+  clear()
+  lfs.mkdir('test-glob')
+  execute('cd test-glob')
+end)
+
+after_each(function()
+  lfs.rmdir('test-glob')
+end)
+
+describe('glob()', function()
+  it("glob('.*') returns . and .. ", function()
+    eq({'.', '..'}, eval("glob('.*', 0, 1)"))
+  end)
+  it("glob('*') returns an empty list ", function()
+    eq({}, eval("glob('*', 0, 1)"))
+  end)
+end)