emulators/linux_base-{f10,c6}: fix locales installation

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=183247
x11-toolkits/linux-c6-gtk2: install gtk2 engines like f10

This should make linux gtk2 apps have the same look as native.
For example, put the following into ~/.gtkrc-2.0

  gtk-theme-name = "ThinIce"
Merge pull request #34 from hadvaid/misc

miscellaneous fixes