ports/96044: [PATCH] graphics/mingplot: Rename ming.so to mingc.so

[Hiroyuki Iwatsuki]

Sorry, this is typo.

> because graphics/ming is updated to 0.3.0.0.1.7.
because graphics/ruby-ming is updated to 0.3.0.0.1.7.

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IWATSUKI Hiroyuki <URL:mailto:don at na.rim.or.jp>