Add workaround for busybox cpio

build

@@ -1814,14 +1814,20 @@ for RECIPEPATH in "${RECIPEFILES[@]}" ; do
 	echo "#!/bin/sh -e" > $BUILD_ROOT/.unpack.command
 	shellquote cd "$TOPDIR/SOURCES" >> $BUILD_ROOT/.unpack.command
 	echo >> $BUILD_ROOT/.unpack.command
-	echo -n 'cpio --extract --owner="'$BUILD_USER'" --unconditional --preserve-modification-time --make-directories <' >> $BUILD_ROOT/.unpack.command
+	if test -L $BUILD_ROOT/usr/bin/cpio -a $(readlink $BUILD_ROOT/usr/bin/cpio) = /bin/busybox ; then
+	    rm -f $BUILD_ROOT/.build.unpackarchive
+	    cp "$BUILD_DIR/unpackarchive" $BUILD_ROOT/.build.unpackarchive
+	    echo -n 'perl /.build.unpackarchive --cpio < ' >> $BUILD_ROOT/.unpack.command
+	else
+	    echo -n 'cpio --extract --owner="'$BUILD_USER'" --unconditional --preserve-modification-time --make-directories <' >> $BUILD_ROOT/.unpack.command
+	fi
 	shellquote "$i" >> $BUILD_ROOT/.unpack.command
 	echo >> $BUILD_ROOT/.unpack.command
 	shellquote rm -f "$i" >> $BUILD_ROOT/.unpack.command
 	echo >> $BUILD_ROOT/.unpack.command
 	chmod 0755 $BUILD_ROOT/.unpack.command
 	chroot $BUILD_ROOT su -c /.unpack.command - $BUILD_USER || cleanup_and_exit 1
-	rm -f $BUILD_ROOT/.unpack.command
+	rm -f $BUILD_ROOT/.unpack.command $BUILD_ROOT/.build.unpackarchive
     done
 
     # macros may be used by buildtime services or non-rpm build types