Use utf-8 encoding in test-branchmap's clone call

After 75520c24feda it is printed in local encoding, i.e. "C" if not set
otherwise.

tests/test-branchmap

@@ -1,23 +1,23
 #!/bin/sh
 
 hgserve()
 {
     hg serve -a localhost -p $HGPORT1 -d --pid-file=hg.pid -E errors.log -v $@ \
         | sed -e 's/:[0-9][0-9]*//g' -e 's/http:\/\/[^/]*\//http:\/\/localhost\//'
     cat hg.pid >> "$DAEMON_PIDS"
 }
 
 hg init a
 hg --encoding utf-8 -R a branch æ
 echo foo > a/foo
 hg -R a ci -Am foo
 
 hgserve -R a --config web.push_ssl=False --config web.allow_push=* --encoding latin1
-hg clone http://localhost:$HGPORT1 b
+hg --encoding utf-8 clone http://localhost:$HGPORT1 b
 hg --encoding utf-8 -R b log
 echo bar >> b/foo
 hg -R b ci -m bar
 hg --encoding utf-8 -R b push | sed "s/$HGPORT1/PORT/"
 hg -R a --encoding utf-8 log
 
 kill `cat hg.pid`