[gnome-system-monitor] Update Polish translation

[Piotr Drąg <piotrdrag src gnome org>]

commit 3c1e24b7748dac0a1fdf38da1befd3be22e52aed
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Mon Sep 18 05:19:58 2017 +0200

    Update Polish translation

 po/pl.po |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/po/pl.po b/po/pl.po
index 6f38676..012f1c9 100644
--- a/po/pl.po
+++ b/po/pl.po
@@ -13,8 +13,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: gnome-system-monitor\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2017-08-11 23:04+0200\n"
-"PO-Revision-Date: 2017-08-11 23:05+0200\n"
+"POT-Creation-Date: 2017-09-18 05:18+0200\n"
+"PO-Revision-Date: 2017-09-18 05:19+0200\n"
 "Last-Translator: Piotr Drąg <piotrdrag gmail com>\n"
 "Language-Team: Polish <community-poland mozilla org>\n"
 "Language: pl\n"
@@ -1245,7 +1245,7 @@ msgstr ""
 #: ../src/procproperties.cpp:50 ../src/procproperties.cpp:84
 #: ../src/procproperties.cpp:87 ../src/util.cpp:432 ../src/util.cpp:471
 msgid "N/A"
-msgstr "Nie dotyczy"
+msgstr "Niedostępne"
 
 #: ../src/procproperties.cpp:67 ../src/proctable.cpp:322
 msgid "Process Name"