l10n: zh_CN: Update Translation: "tag object"

* "tag object" translated as "标签对象".
* "objects to be packed" translated as "待打包对象".
* Add "那些", for better reading experience.

Signed-off-by: Ray Chen <oldsharp@gmail.com>
Signed-off-by: Jiang Xin <worldhello.net@gmail.com>

po/zh_CN.po

@@ -13,7 +13,7 @@ msgstr ""
 "Project-Id-Version: Git\n"
 "Report-Msgid-Bugs-To: Git Mailing List <git@vger.kernel.org>\n"
 "POT-Creation-Date: 2015-07-14 07:19+0800\n"
-"PO-Revision-Date: 2015-07-14 07:32+0800\n"
+"PO-Revision-Date: 2015-07-27 23:37+0800\n"
 "Last-Translator: Jiang Xin <worldhello.net@gmail.com>\n"
 "Language-Team: GitHub <https://github.com/jiangxin/git/>\n"
 "Language: zh_CN\n"
@@ -7974,7 +7974,7 @@ msgstr "输出包到标准输出"
 
 #: builtin/pack-objects.c:2669
 msgid "include tag objects that refer to objects to be packed"
-msgstr "包括引用了打包对象的 tag"
+msgstr "包括那些引用了待打包对象的标签对象"
 
 #: builtin/pack-objects.c:2671
 msgid "keep unreachable objects"
@@ -10314,7 +10314,7 @@ msgstr "显示工作区状态"
 
 #: common-cmds.h:38
 msgid "Create, list, delete or verify a tag object signed with GPG"
-msgstr "创建、列出、删除或校验一个GPG签名的 tag 对象"
+msgstr "创建、列出、删除或校验一个GPG签名的标签对象"
 
 #: parse-options.h:142
 msgid "expiry-date"