math/oleo WITHOUT_X11 patch

[siflus]

math/oleo's makefile uses X11 by default, and it didn't seem to have a way
to prevent
it from including the X11 libs as a dependncy.
I created a patch to resolve this by checking if WITHOUT_X11 is defined (in
the normal way)
and adding the options to CONFIGURE_ENV.

-siflus
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