zdtm: Some updates to treat NFS fds properly

First of all, silly-rename files' names may change, so
kludge the fds comparison properly.

Other than this, allow for linked-remaps on write_read10
test as it effectively generates such on NFS.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

test/zdtm.sh

@@ -357,7 +357,7 @@ stop_test()
 save_fds()
 {
 	test -n "$PIDNS" && return 0
-	ls -l /proc/$1/fd | sed 's/\(-> \(pipe\|socket\)\):.*/\1/' | awk '{ print $9,$10,$11; }' > $2
+	ls -l /proc/$1/fd | sed 's/\(-> \(pipe\|socket\)\):.*/\1/' | sed -e 's/\/.nfs[0-9a-zA-Z]*/.nfs-silly-rename/' | awk '{ print $9,$10,$11; }' > $2
 }
 
 save_maps()
@@ -401,6 +401,9 @@ run_test()
 	if [[ $1 =~ "unlink_" ]]; then
 		linkremap="--link-remap"
 	fi
+	if [[ $1 =~ "write_read10" ]]; then
+		linkremap="--link-remap"
+	fi
 
 	if [ -n "$MAINSTREAM_KERNEL" ] && [ $COMPILE_ONLY -eq 0 ] && echo $TEST_CR_KERNEL | grep -q ${test#ns/}; then
 		echo "Skip $test"