change man handling depending on arch

scripts/rh/3proxy.spec

@@ -47,7 +47,7 @@ make clean
 /usr/local/3proxy/libexec/StringsPlugin.ld.so
 /usr/local/3proxy/libexec/TrafficPlugin.ld.so
 /usr/local/3proxy/libexec/TransparentPlugin.ld.so
-%if "%{cross}" == "yes"
+%if "%{_arch}" == "arm"
 /usr/share/man/man3/3proxy.cfg.3
 /usr/share/man/man8/3proxy.8
 /usr/share/man/man8/ftppr.8