deps: sync deps/http_parser with nodejs/http_parser

The upstream and dep were slightly out of sync due to the way the
recent security update had to be done. This brings the two back
into sync. This update includes a couple of fixed tests and a
performance related semver-patch update to the http method parsing.

PR-URL: https://github.com/nodejs/node/pull/5600


Reviewed-By: Fedor Indutny <fedor.indutny@gmail.com>
Reviewed-By: Johan Bergström <bugs@bergstroem.nu>