File percona-xtrabackup-2.0.2-nodoc.patch of Package xtrabackup

The rpm spec file extracts the MySQL sources during %setup, 
make the build script work with that.

Index: utils/build.sh
===================================================================
--- utils/build.sh.orig	2012-08-07 17:04:50.000000000 +0100
+++ utils/build.sh	2012-08-14 19:18:52.000000000 +0100
@@ -80,7 +80,6 @@ AUTO_DOWNLOAD to \"yes\""
 ################################################################################
 function unpack_and_patch()
 {
-    tar xzf $top_dir/$1
     cd `basename "$1" ".tar.gz"`
     patch -p1 < $top_dir/patches/$2
     cd ..
@@ -160,9 +159,6 @@ function build_all()
     server_tarball=mysql-$mysql_version.tar.gz
     innodb_dir=$server_dir/storage/$innodb_name
 
-    echo "Downloading sources"
-    auto_download $server_tarball
-
     test -d $server_dir && rm -r $server_dir
 
     echo "Preparing sources"