[dev-qt/qtgui:4] Build tga imageformats plugin.

Package-Manager: portage-2.2.0_alpha186
[dev-qt/qtgui:4] Stop pretending that GIF support can be disabled.

The plugin was always built, regardless of the USE flag.

Package-Manager: portage-2.2.0_alpha186
[dev-qt/qtgui:4] Update QCONFIG_*

Package-Manager: portage-2.2.0_alpha186