component/chrpath: add support for newer architecture (e.g. riscv)

component/chrpath/buildout.cfg

 [buildout]
+extends =
+  ../gnu-config/buildout.cfg
 parts =
   chrpath
 
@@ -6,3 +8,4 @@ parts =
 recipe = slapos.recipe.cmmi
 url = http://http.debian.net/debian/pool/main/c/chrpath/chrpath_0.16.orig.tar.gz
 md5sum = 2bf8d1d1ee345fc8a7915576f5649982
+pre-configure = cp -f ${gnu-config:location}/config.sub ${gnu-config:location}/config.guess .