Add koji as BuildRequires

koji.read_config() now throws error if config search
path is empty. See https://pagure.io/koji/pull-request/1787

Fixes: RHBZ#1799575

Thanks to Dodji for figuring out the root cause of build failure

Signed-off-by: Sinny Kumari <sinny@redhat.com>

libabigail.spec

@@ -3,7 +3,7 @@
 
 Name: libabigail
 Version: 1.6
-Release: 3%{?dist}
+Release: 4%{?dist}
 Summary: Set of ABI analysis tools
 
 License: LGPLv3+
@@ -20,6 +20,7 @@ BuildRequires: texinfo
 BuildRequires: dos2unix
 BuildRequires: dpkg
 BuildRequires: wget
+BuildRequires: koji
 
 %description
 The libabigail package comprises seven command line utilities:
@@ -154,6 +155,10 @@ fi
 %endif
 
 %changelog
+* Mon Feb 17 2020 Sinny Kumari <skumari@fedoraproject.org> - 1.6-4
+- Add koji as BuildRequires
+- Fixes: RHBZ#1799575
+
 * Wed Jan 29 2020 Fedora Release Engineering <releng@fedoraproject.org> - 1.6-3
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_32_Mass_Rebuild