put in utf8 forcing workaround

Haskell's IO layer crashes on characters > 255 when in a non-unicode (latin1)
locale. Until Haskell gets better behavior, put in an admittedly ugly
workaround for that: git-annex forces utf8 output mode no matter what
locale is selected. So if you use a non-utf8 locale, your filenames with
characters > 127 will not be displayed as you'd expect. But at least it
won't crash.

git-annex.hs

@@ -8,6 +8,7 @@
 import System.Environment
 
 import GitAnnex
+
 main :: IO ()
 main = do
 	args <- getArgs