Add keywords to desktop file

Note: "Event Viewer" is the name of the equivalent application in Microsoft Windows

src/org.kde.ksystemlog.desktop

@@ -6,6 +6,7 @@ Terminal=false
 Categories=Qt;KDE;System;Monitor;
 X-DocPath=ksystemlog/index.html
 X-KDE-SubstituteUID=true
+Keywords=log;logfile;system messages;system log;kernel log;authentication log;X.org log;journald log;services logs;Event Viewer;eventvwr;eventlog
 
 Name=KSystemLog
 Name[ar]=سجلّات نظامك