Task #2230379 (cont.): Replace Malaysian icon.

Downloaded SVG flag from Wikipedia[1], ran it through `convert`[2], and
then finally through `pngcrush`[3].

[1] https://en.wikipedia.org/wiki/File:Flag_of_Malaysia.svg
[2] convert -resize x12 -sigmoidal-contrast 10,50%
[3] pngcrush -brute -fix -force -l9 -oldtimestamp -reduce