remove -lgeos_c and link to .o file

[mmomtchev]

There is no shared library built for libgeos The GDAL build is static anyway, so it is not needed either There is a static .o file that gyp will automatically include if -lgeos_c is omitted

20

[yocontra]

Thanks - looks like this was a holdover from the previous repo. I'll test it out and release as a patch bump if everything works out.