py-wxpython-2.8 dependencies: add proper variants for proper use of wxWidgets-2.8 vs. wxgtk-2.8

[mojca (Mojca Miklavec)]

All dependencies of py-wxpython-2.8 need variants to account for the difference between linking against py-wxpython-2.8 +carbon and py-wxpython-2.8 +gtk. These ports are:

• gis/grass (see also #36904; active development, but no attempts to make it compatible with 3.0 yet)
• python/py-robotframework-ride (see also #40297; it builds against 3.0, but has problems, upstream is working on compatibility with 3.0)
• python/py26-pyphant (see also #40347; likely to become compatible with 3.0 soon)
• python/py-pyface (see also #40207; wx is not a strict requirement)

Outdated/abandoned ones:

• editors/spe
• python/py-dsv
• net/bittorrent

Plus maybe those with (temporarily?) disabled support for wxWidgets:

• games/sounddecompress

On Xcode >= 4.4 py-wxpython-2.8 can only be installed with +gtk, so there is no problem, but with earlier releases of Xcode where +carbon is default, these dependencies need to be aware of incompatibility with x86_64, clang and possibly other minor issues.

On top of that some ports are conditionally compatible with py-wxpython-3.0 and one needs to keep in mind that py27-wxpython-2.8 is conflicting with py27-wxpython-3.0 and the reasonable compromise I see is to allow these ports to link against py26-wxpython-2.8 in order to allow side-by-side installation with dependencies of py27-wxpython-3.0.

I would suggest to provide options with consistent/equal names for all the listed ports, but I'm looking for suggestions.

Just an additional note is that at least bittorrent, py-dsv and spe seem relatively "abandoned" upstream and also have no maintainer.

[cooljeanius (Eric Gallager)]

Cc Me!

[petrrr]

Cc Me!

[mojca (Mojca Miklavec)]

Bittorrent removed from the list of affected ports after removing it from repository (r115270), fixed typos in other port names.