48415a4b00 added impersonation
capabilities to libcurl in the Chrome build. This adds the same
capabilities to the Firefox build as well.
curl-impersonate.patch generated from
b30b245b72
Consolidate all of curl's patch files into a single file (one for each
browser). The modified curl source code is now maintained in Git (at
https://github.com/lwthiker/curl) and it is easier to just
generate the needed patch with 'git --diff'.