archrelease: Fix removal of repository content

Fix the `svn rm` invocation when releasing to a repository that already
contains some files. `svn ls` only returns basenames, so we need to
prepend the path here.

Regression introduced in 8384ad849d.

Signed-off-by: Lukas Fleischer <archlinux@cryptocrack.de>
Signed-off-by: Pierre Schmitz <pierre@archlinux.de>

archrelease

@@ -31,7 +31,7 @@ echo -n "releasing package to ${1}..."
 pushd .. >/dev/null
 if [ -d "repos/${1}" ]; then
 	for file in $(svn ls "repos/${1}"); do
-		svn rm -q "$file"
+		svn rm -q "repos/${1}/$file"
 	done
 fi
 if [ ! -d repos ]; then