[SOUP] [GnuTLS] Don't use a SSL3.0 record version in client hello.
https://bugs.webkit.org/show_bug.cgi?id=138794

Reviewed by Sergio Villar Senin.

It seems that following POODLE many sites incorrectly banned SSL 3.0
record packet versions. Since GnuTLS uses a SSL 3.0 record to
advertise TLS 1.2, they are effectively banning it even if it doesn't
advertise SSL 3.0. That is a server issue, but it can be worked around
by using the modifier %LATEST_RECORD_VERSION.

With this modifier, GnuTLS will use the latest TLS version record
in client hello instead of using the default SSL 3.0.

* NetworkProcess/EntryPoint/unix/NetworkProcessMain.cpp:
(main):
* WebProcess/EntryPoint/unix/WebProcessMain.cpp:
(main):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@176252 268f45cc-cd09-0410-ab3c-d52691b4dbfc