tests: more portability fix for the old systems

tests/test-bad-pull

@@ -2,7 +2,7 b''
 
 hg clone http://localhost:20059/ copy
 echo $?
-ls copy
+ls copy 2>/dev/null || echo copy: No such file or directory
 
 cat > dumb.py <<EOF
 import BaseHTTPServer, SimpleHTTPServer, signal

tests/test-bad-pull.out

@@ -1,7 +1,7 b''
 requesting all changes
 abort: error: Connection refused
 255
-ls: copy: No such file or directory
+copy: No such file or directory
 requesting all changes
 abort: HTTP Error 404: File not found
 255

tests/test-static-http

@@ -2,7 +2,7 b''
 
 http_proxy= hg clone old-http://localhost:20059/ copy
 echo $?
-ls copy
+ls copy 2>/dev/null || echo copy: No such file or directory
 
 # This server doesn't do range requests so it's basically only good for
 # one pull

tests/test-static-http.out

@@ -1,6 +1,6 b''
 abort: Connection refused
 255
-ls: copy: No such file or directory
+copy: No such file or directory
 changeset:   0:53e17d176ae6
 tag:         tip
 user:        test