[Xastir] GraphicsMagick - missing library file(s)

[Lee Bengston]

In attempting to build Xastir after upgrading from Ubuntu 16.04 to 16.10, I
got the following message:

WARNING: *** Cannot find GraphicsMagick library files: Building w/o
GraphicsMagick support.

After a looking at the installed files via Synaptic in /usr/lib in 16.04
vs. 16.10, I didn't see any difference with respect to either the
graphicsmagick package or the libgraphicsmagick1-dev package.  I'm not good
enough at deciphering the configure script to determine which file(s) it
can't find.  There's a separate warning if it can't find "include" files,
so I'm assuming there's no issue with those.

Thanks
Lee - K5DAT