Update FR OLPC layout

Update FR OLPC layout

Some keys have only two characters printed: the unmodified character,
and a character in the Shift+AltGr position (upper right).
For such keys, users were confused why the "other" character could not
be accessed with AltGr alone.

Make such keys behave shift-invariant to remove this confusion.

Also add some obvious omissions from the previous submission fixing
various other keys that weren't working as printed.

The corresponding keyboard can be seen here:
http://wiki.laptop.org/go/OLPC_Azerty_Keyboard

Investigation and original patch from Walter Bender.

https://bugs.freedesktop.org/show_bug.cgi?id=50064