Log Message:
Update lua-alt-getopt to 0.7.0.

Patch provided by Aleksey Cheusov in PR 42195.

Changes:

  FIX: POSIX getopt("xo:") accepts './app -xoVVV' and './app -xo VVV'
  treating them as './app -x -o VVV'.
  Now Lua alt_getopt does the same.

  Additional regression tests/examples

  error() function is not used for exiting anymore.
  os.exit() is used instead.