Convert two missed phutil_utf8_shorten() callsites

Summary: Fixes T6006. These didn't get caught by D10392.

Test Plan: Forced migration to re-run; ran SSH commands against Phabricator.

Auditors: btrahan

resources/sql/patches/20131121.repocredentials.2.mig.php

@@ -67,9 +67,14 @@
   foreach ($credential_usernames as $username => $credential_secrets) {
     foreach ($credential_secrets as $secret_plaintext => $repositories) {
       $callsigns = mpull($repositories, 'getCallsign');
+
+      $signs = implode(', ', $callsigns);
+
       $name = pht(
         'Migrated Repository Credential (%s)',
-        phutil_utf8_shorten(implode(', ', $callsigns), 128));
+        id(new PhutilUTF8StringTruncator())
+          ->setMaximumGlyphs(128)
+          ->truncateString($signs));
 
       echo "Creating: {$name}...\n";
 

scripts/ssh/ssh-exec.php

@@ -82,12 +82,15 @@
         implode(', ', $workflow_names)));
   }
 
+  $log_argv = implode(' ', array_slice($original_argv, 1));
+  $log_argv = id(new PhutilUTF8StringTruncator())
+    ->setMaximumCodepoints(128)
+    ->truncateString($log_argv);
+
   $ssh_log->setData(
     array(
       'C' => $original_argv[0],
-      'U' => phutil_utf8_shorten(
-        implode(' ', array_slice($original_argv, 1)),
-        128),
+      'U' => $log_argv,
     ));
 
   $command = head($original_argv);