Accepting request 1043177 from home:dirkmueller:Factory

- switch to pkgconfig(zlib) so that alternative providers can be
  used

OBS-URL: https://build.opensuse.org/request/show/1043177
OBS-URL: https://build.opensuse.org/package/show/server:http/uwsgi?expand=0&rev=111

uwsgi.spec

@@ -118,7 +118,7 @@ BuildRequires:  v8-devel
 %endif
 %endif
 BuildRequires:  zeromq-devel
-BuildRequires:  zlib-devel
+BuildRequires:  pkgconfig(zlib)
 %{?systemd_requires}
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 Provides:       uwsgi-carbon = %{version}