remove %_isa from buildrequires (#1545183)

ghc-zlib.spec

@@ -18,7 +18,7 @@ BuildRequires:  ghc-Cabal-devel
 BuildRequires:  ghc-rpm-macros
 # Begin cabal-rpm deps:
 BuildRequires:  ghc-bytestring-devel
-BuildRequires:  zlib-devel%{?_isa}
+BuildRequires:  zlib-devel
 %if %{with tests}
 BuildRequires:  ghc-QuickCheck-devel
 BuildRequires:  ghc-tasty-devel
@@ -92,6 +92,9 @@ rm -r cbits
 
 
 %changelog
+* Thu Feb 15 2018 Jens Petersen <petersen@redhat.com> - 0.6.1.2-5
+- remove _isa from buildrequires (#1545183)
+
 * Wed Feb 07 2018 Fedora Release Engineering <releng@fedoraproject.org> - 0.6.1.2-5
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild