Use xstrdup whether possible

Using xstrdup lets us have an error message printed if malloc() fails.

travis-ci: success for Assorted nitpicks
Signed-off-by: Kir Kolyshkin <kir@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

criu/files-reg.c

@@ -81,7 +81,7 @@ static int note_link_remap(char *path, struct ns_id *nsid)
 	if (!rlb)
 		goto err;
 
-	rlb->path = strdup(path);
+	rlb->path = xstrdup(path);
 	if (!rlb->path)
 		goto err2;
 

criu/plugin.c

@@ -29,7 +29,7 @@ static cr_plugin_desc_t *cr_gen_plugin_desc(void *h, char *path)
 	if (!d)
 		return NULL;
 
-	d->name		= strdup(path);
+	d->name		= xstrdup(path);
 	d->max_hooks	= CR_PLUGIN_HOOK__MAX;
 	d->version	= CRIU_PLUGIN_VERSION_OLD;