Fix 4 typos in code

Summary: Fixes T12516

Test Plan: grep for those typos

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: epriestley, PHID-OPKG-gm6ozazyms6q6i22gyam

Maniphest Tasks: T12516

Differential Revision: https://secure.phabricator.com/D17638

src/applications/drydock/management/DrydockManagementLeaseWorkflow.php

@@ -22,7 +22,7 @@ final class DrydockManagementLeaseWorkflow
           array(
             'name'      => 'attributes',
             'param'     => 'name=value,...',
-            'help'      => pht('Resource specficiation.'),
+            'help'      => pht('Resource specification.'),
           ),
         ));
   }

src/applications/harbormaster/stepgroup/HarbormasterExternalBuildStepGroup.php

@@ -6,7 +6,7 @@ final class HarbormasterExternalBuildStepGroup
   const GROUPKEY = 'harbormaster.external';
 
   public function getGroupName() {
-    return pht('Interacting with External Build Sytems');
+    return pht('Interacting with External Build Systems');
   }
 
   public function getGroupOrder() {

src/applications/people/controller/PhabricatorPeopleLdapController.php

@@ -38,7 +38,7 @@ final class PhabricatorPeopleLdapController
 
     $crumbs = $this->buildApplicationCrumbs();
     $crumbs->addTextCrumb(
-      pht('Import Ldap Users'),
+      pht('Import LDAP Users'),
       $this->getApplicationURI('/ldap/'));
 
     $nav = $this->buildSideNavView();
@@ -56,7 +56,7 @@ final class PhabricatorPeopleLdapController
     }
 
     return $this->newPage()
-      ->setTitle(pht('Import Ldap Users'))
+      ->setTitle(pht('Import LDAP Users'))
       ->setCrumbs($crumbs)
       ->setNavigation($nav);
   }