scripts/unpack, scripts/extract: add support to extract '*.7z' files

Signed-off-by: Stephan Raue <stephan@openelec.tv>

scripts/extract

@@ -30,6 +30,10 @@ for s in `sed 's%.*/\(.*\)\$%\1%' $PKG_DIR/url`; do
       *.tar.gz | *.tgz)
         tar xzf $f -C $3
         ;;
+      *.7z)
+        mkdir -p $3/$1
+        7z x -o$3/$1 $f
+        ;;
       *.diff | *.patch)
         cat $f | patch -d $3 -p1
         ;;

scripts/unpack

@@ -40,6 +40,7 @@ if [ -f $PKG_DIR/url ]; then
   $SCRIPTS/extract $1 "$1*.tar.bz2" $BUILD
   $SCRIPTS/extract $1 "$1*.tar.gz"  $BUILD
   $SCRIPTS/extract $1 "$1*.tgz"     $BUILD
+  $SCRIPTS/extract $1 "$1*.7z"      $BUILD
 fi
 
 if [ -d $PKG_DIR/sources ]; then