misalignment in ls -l in fr_FR locale

[Samuel Thibault]

Hello,

$ ls -l
drwxr-xr-x  5 samy samy 4,0K mars 17 22:33 tmp/
drwx------  5 samy samy 4,0K févr. 12 18:20 u/

Because in the fr_FR locale abmon does not have a constant width, the
content of ls -l is misaligned.  Locale standards require abday to have
a constant width, but that does not apply to abmon, so coreutils should
take that into account.

Samuel