Disable libevent to bootstrap ldap on riscv64

libevent (the current one) has a newer SOVERSION. That break build group
in Koji.

Signed-off-by: David Abdurachmanov <davidlt@rivosinc.com>

openldap.spec

@@ -14,7 +14,7 @@
 
 Name: openldap
 Version: 2.6.3
-Release: 1%{?dist}
+Release: 1.0.riscv64%{?dist}
 Summary: LDAP support libraries
 License: OpenLDAP
 URL: http://www.openldap.org/
@@ -57,7 +57,9 @@ BuildRequires: glibc-devel
 BuildRequires: groff
 BuildRequires: krb5-devel
 BuildRequires: libtool-ltdl-devel
+%ifnarch riscv64
 BuildRequires: libevent-devel
+%endif
 BuildRequires: make
 BuildRequires: openssl-devel
 BuildRequires: perl(ExtUtils::Embed)
@@ -504,6 +506,9 @@ exit 0
 %{_libdir}/libslapi-2.4*.so.*
 
 %changelog
+* Tue Sep 13 2022 David Abdurachmanov <davidlt@rivosinc.com> - 2.6.3-1.0.riscv64
+- Rmove BR for libevent on riscv64 (SOVERSION change)
+
 * Wed Aug 17 2022 Simon Pichugin <spichugi@redhat.com> - 2.6.3-1
 - Rebase to version 2.6.3
   Related: rhbz#2107382