lua-curl: fix build with libcurl 7.62.0

lua-curl: fix build with libcurl 7.62.0

The last libcurl bump changed error code definitions in a way that
breaks lua-curl build. Add a patch to fix that.

Fixes:
http://autobuild.buildroot.net/results/fa6/fa6e289162124b3e079c4a2d9c3f00910c8cc063/
http://autobuild.buildroot.net/results/7b9/7b962a63630abaed21d99f719c1bd710ec4d4b28/
http://autobuild.buildroot.net/results/c5b/c5b2a7f21259bbf79861bd95a2d7ca055920bf09/

Cc: Francois Perrad <francois.perrad@gadz.org>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>