restart coprocess in raw mode

Restarting a crashing git process could result in filename encoding issues
when not in a unicode locale, as the restarted processes's handles were not
read in raw mode.

Since rawMode is always used when starting a coprocess, didn't bother
to parameterise it and just always enable it for simplicity.

This commit was sponsored by Jake Vosloo on Patreon.

Git/CheckAttr.hs

@@ -24,7 +24,7 @@ type Attr = String
 checkAttrStart :: [Attr] -> Repo -> IO CheckAttrHandle
 checkAttrStart attrs repo = do
 	currdir <- getCurrentDirectory
-	h <- CoProcess.rawMode =<< gitCoProcessStart True params repo
+	h <- gitCoProcessStart True params repo
 	oldgit <- Git.Version.older "1.7.7"
 	return (h, attrs, oldgit, currdir)
   where