community/lua-http: add patch to fix cookie_spec

Patch https://github.com/daurnimator/lua-http/commit/b6934d04a494a3d3014307507c25af4cca3f4f59

should solve few builders

Failure -> spec/cookie_spec.lua @ 26
cookie module :get works
spec/cookie_spec.lua:31: Expected objects to be the same.
Passed in:
(nil)
Expected:
(string) 'en-US'

Failure -> spec/cookie_spec.lua @ 252
cookie module cleans up
spec/cookie_spec.lua:255: Expected objects to be the same.
Passed in:
(nil)
Expected:
(string) 'foo'
>>> ERROR: lua-http: check failed