git-gui: Correct encoding of glossary/fr.po to UTF-8
git-gui: Correct encoding of glossary/fr.po to UTF-8

Junio noticed this was incorrectly added in ISO-8859-1 but it should
be in UTF-8 (as the headers claim UTF-8, and our convention is to use
only UTF-8).

Signed-off-by: Shawn O. Pearce <f01032651c12a22b2103346ba96b3b6b231f9d3c@spearce.org>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git