devel:libpython was in BUILD_PREREQUIRES until the previous commit
and was moved to BUILD_REQUIRES. Move it back to BUILD_PREREQUIRES.
Every commit in this recipe has been tested locally on each arch,
but something went wrong with pycurl_x86 in the build servers.
A REVISION bump was not necessary because the resulting packages
are the same except that REQUIRES_python{,3} are now sorted. But
let's kick a rebuild, after all.