grass-64: add desc and mavericks, yosemite bottles
grass-64: add desc and mavericks, yosemite bottles

Signed-off-by: Larry Shaffer <c14ae11560132dad1914a5ada5004ef35b28377d@dakotacarto.com>

OSGeo/homebrew-osgeo4mac,OSGeo/homebrew-osgeo4mac,OSGeo/homebrew-osgeo4mac