Update config.{sub,guess} scripts

Needed to detect riscv64.

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

libffado.spec

@@ -13,7 +13,7 @@
 Summary:        Free firewire audio driver library
 Name:           libffado
 Version:        2.4.8
-Release:        %autorelease
+Release:        %autorelease -e 0.riscv64
 License:        GPLv2 or GPLv3
 URL:            http://www.ffado.org/
 Source0:        http://www.ffado.org/files/%{name}-%{version}.tgz
@@ -98,6 +98,11 @@ Applications and utilities for use with libffado.
     support/mixer-qt4/ffado-mixer* support/mixer-qt4/SConscript \
     support/tools/*.py support/tools/SConscript
 
+%ifarch riscv64
+find . -name 'config.sub' -exec cp -vf /usr/lib/rpm/%{?_vendor}/config.sub {} \;
+find . -name 'config.guess' -exec cp -vf /usr/lib/rpm/%{?_vendor}/config.guess {} \;
+%endif
+
 %build
 export CFLAGS="%{optflags} -ffast-math"
 export CXXFLAGS="%{optflags} -ffast-math --std=gnu++11"