libcgi: bump to version 1.1

libcgi: bump to version 1.1

Cleanup the libcgi package,
by using https://github.com/rafaelsteil/libcgi as an upstream.
Remove old patch and use cmake to build new version.

Signed-off-by: Joe Lin <xlcwu.taiwan@gmail.com>
[Mario:
- Use github URL in Config.in
- Use upstream sha256 hash]
Signed-off-by: Mario J. Rugiero <mrugiero@gmail.com>
[Arnout:
- Add reference to upstream hash file
- Remove unneeded LIBCGI_SUPPORTS_IN_SOURCE_BUILD = NO]
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>