Allow undefined macros when building zlib
Allow undefined macros when building zlib

When building Erlang on a system that uses the Musl C library, it's
possible to get the following error:

    In file included from zlib/adler32.c:11:0:
    zlib/zutil.h:172:39: error: "_LFS64_LARGEFILE" is not defined [-Werror=undef]
         (!defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0)
                                           ^~~~~~~~~~~~~~~~
    cc1: some warnings being treated as errors

On the same systems, zlib is built without `-Werror=undef` so do the
same when building it with Erlang.

Signed-off-by: Frank Hunleth <586e4180546d16ceaba6f6d4bdcfd7757e552530@troodon-software.com>

getong/otp,g-andrade/otp,bsmr-erlang/otp,legoscia/otp,bjorng/otp,emacsmirror/erlang,g-andrade/otp,electricimp/otp,erlang/otp,kvakvs/otp,potatosalad/otp,aboroska/otp,bsmr-erlang/otp,aboroska/otp,rlipscombe/otp,erlang/otp,mikpe/otp,vladdu/otp,bjorng/otp,dgud/otp,lrascao/otp,emacsmirror/erlang,aboroska/otp,bjorng/otp,dgud/otp,ferd/otp,dgud/otp,erlang/otp,electricimp/otp,aboroska/otp,getong/otp,RoadRunnr/otp,bsmr-erlang/otp,ferd/otp,ferd/otp,electricimp/otp,getong/otp,g-andrade/otp,vinoski/otp,legoscia/otp,bsmr-erlang/otp,rlipscombe/otp,potatosalad/otp,mikpe/otp,erlang/otp,lrascao/otp,ferd/otp,electricimp/otp,vinoski/otp,isvilen/otp,aboroska/otp,lrascao/otp,rlipscombe/otp,mikpe/otp,jj1bdx/otp,kvakvs/otp,RoadRunnr/otp,dumbbell/otp,vladdu/otp,dumbbell/otp,rlipscombe/otp,dgud/otp,lrascao/otp,dumbbell/otp,mikpe/otp,legoscia/otp,jj1bdx/otp,vinoski/otp,RoadRunnr/otp,isvilen/otp,kvakvs/otp,g-andrade/otp,dgud/otp,erlang/otp,uabboli/otp,kvakvs/otp,g-andrade/otp,legoscia/otp,electricimp/otp,bjorng/otp,mikpe/otp,rlipscombe/otp,vinoski/otp,uabboli/otp,potatosalad/otp,RoadRunnr/otp,mikpe/otp,jj1bdx/otp,kvakvs/otp,isvilen/otp,vinoski/otp,jj1bdx/otp,jj1bdx/otp,aboroska/otp,g-andrade/otp,getong/otp,RoadRunnr/otp,jj1bdx/otp,isvilen/otp,rlipscombe/otp,ferd/otp,RoadRunnr/otp,vladdu/otp,bjorng/otp,vladdu/otp,dgud/otp,bsmr-erlang/otp,vladdu/otp,rlipscombe/otp,uabboli/otp,ferd/otp,emacsmirror/erlang,potatosalad/otp,emacsmirror/erlang,uabboli/otp,erlang/otp,isvilen/otp,potatosalad/otp,dgud/otp,emacsmirror/erlang,aboroska/otp,vladdu/otp,erlang/otp,vinoski/otp,uabboli/otp,emacsmirror/erlang,dumbbell/otp,lrascao/otp,electricimp/otp,isvilen/otp,emacsmirror/erlang,dumbbell/otp,RoadRunnr/otp,jj1bdx/otp,legoscia/otp,ferd/otp,dgud/otp,g-andrade/otp,kvakvs/otp,lrascao/otp,vinoski/otp,getong/otp,jj1bdx/otp,emacsmirror/erlang,dumbbell/otp,bsmr-erlang/otp,bjorng/otp,uabboli/otp,isvilen/otp,rlipscombe/otp,getong/otp,g-andrade/otp,electricimp/otp,dumbbell/otp,ferd/otp,getong/otp,potatosalad/otp,isvilen/otp,uabboli/otp,bsmr-erlang/otp,potatosalad/otp,emacsmirror/erlang,RoadRunnr/otp,kvakvs/otp,dumbbell/otp,lrascao/otp,kvakvs/otp,aboroska/otp,getong/otp,electricimp/otp,legoscia/otp,electricimp/otp,bjorng/otp,legoscia/otp,uabboli/otp,mikpe/otp,bjorng/otp,potatosalad/otp,g-andrade/otp,vladdu/otp,rlipscombe/otp,dgud/otp,rlipscombe/otp,getong/otp,mikpe/otp,lrascao/otp,bjorng/otp,isvilen/otp,aboroska/otp,vinoski/otp,isvilen/otp,emacsmirror/erlang,erlang/otp,bjorng/otp,ferd/otp,jj1bdx/otp,lrascao/otp,legoscia/otp,erlang/otp,potatosalad/otp,mikpe/otp,vinoski/otp,RoadRunnr/otp,uabboli/otp,vladdu/otp,vladdu/otp,potatosalad/otp,dgud/otp,bsmr-erlang/otp,erlang/otp,kvakvs/otp,dumbbell/otp,jj1bdx/otp,bsmr-erlang/otp,mikpe/otp,vinoski/otp,getong/otp,dumbbell/otp,g-andrade/otp,legoscia/otp