Add 'GB18030' to gedit

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As we all known, we just can see the wrong types when we open some Chinese files, whose coding is GB18030. GB18030 is the coding of Chinese characters in Chinese national standard.

• Add GB18030 to gedit

# install dconf-tools$ sudo apt-get install dconf-tools# launch dconf-tools$ dconf-editor

Then ,

org  -> gnome -> gedit -> priferences -> encodingstype 'GB18030' in the blank of *auto-detected*

done!