sign.sh: rm signed dir

contrib/build-wine/sign.sh

@@ -15,6 +15,7 @@ if ! which osslsigncode > /dev/null 2>&1; then
     echo "Please install osslsigncode"
 fi
 
+rm -rf signed
 mkdir -p signed >/dev/null 2>&1
 
 cd dist

contrib/build-wine/unsign.sh

@@ -11,7 +11,6 @@ fi
 # exit if command fails
 set -e
 
-rm -rf signed
 mkdir -p signed >/dev/null 2>&1
 mkdir -p signed/stripped >/dev/null 2>&1