The latter is needed for some packages to find libgd.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

Size reduced from 92878 to 91675 bytes.

CMake added CXX files. Removed those.

Removed ceill patch. ceill is not used anymore.

Removed pkgconfig patch. CMake uses a different file, which does not have
this problem.

Further size reduction to 87938 with LTO.

Removed InstallDev. CMAKE_INSTALL takes care of that.

Added WebP support.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

Update libgd to 2.2.4
Fixes multiple CVEs
Refresh patches
Update list according to:
https://svnweb.freebsd.org/ports/head/graphics/gd/pkg-plist?revision=432648&view=markup
...except helpers as it's not generated.

Signed-off-by: Daniel Engberg <daniel.engberg.lists@pyret.net>

Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>