x86_64 is used as a baseline: the "x86_64" entry, whatever status it has,
is transformed into "all", and then the other entries in ARCHITECTURES
either dropped or rearranged appropriately.
This variable is being computed with an eval call which seems to be
upsetting the build bots but none of my systems. So use:
* cmd:python2 instead of cmd:python2.7 and lib:libpython2.7
* cmd:python3 instead of cmd:python3.6 and lib:libpython3.6m
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.