innobackupex --galera-info incompatible with MGC-10.0

When --galera-info option is used, innobackupex script generates a file containing
values of wsrep_last_committed and wsrep_local_state_uuid status variables.
This generated file is required for state transfer in xtrabackup(-v2) mode.

Innobackupex internally stores server status variables in a hash with status variable
name as key. Now, as MGC-10.0 has capitalized wsrep status variable names (like other
server status variables) , the script's attempt to find the values of wsrep_local_state_uuid
& wsrep_last_committed would fail, and hence it won't generate the galera info file required
for state transfer.

One possible solution would be to use SHOW...LIKE:

$ diff -u percona-xtrabackup-2.1.8-Linux-i686/bin/innobackupex.orig percona-xtrabackup-2.1.8-Linux-i686/bin/innobackupex
--- percona-xtrabackup-2.1.8-Linux-i686/bin/innobackupex.orig 2014-04-11 10:14:35.413447410 -0400
+++ percona-xtrabackup-2.1.8-Linux-i686/bin/innobackupex 2014-04-12 00:46:46.970931144 -0400
@@ -2995,6 +2995,9 @@
       } elsif ($query eq 'SHOW STATUS') {
           $con->{status} = $con->{dbh}->selectall_hashref('SHOW STATUS',
                                                         'Variable_name');
+ } elsif ($query =~ m/SHOW STATUS LIKE/) {
+ $con->{status} = $con->{dbh}->selectall_hashref($query,
+ 'Variable_name');
       } elsif ($query eq 'SHOW MASTER STATUS') {
           $con->{master_status} =
               $con->{dbh}->selectrow_hashref("SHOW MASTER STATUS");
@@ -3091,14 +3094,29 @@
     my @info_lines = ();
     my $state_uuid = '';
     my $last_committed = '';
+ my $found = 1;

     # get binlog position
- get_mysql_status($con);

- $state_uuid = $con->{status}->{wsrep_local_state_uuid}->{Value};
- $last_committed = $con->{status}->{wsrep_last_committed}->{Value};
+ mysql_query($con, "SHOW STATUS LIKE 'wsrep_local_state_uuid'");
+ if (scalar keys($con->{status})) {
+ my $key= ((keys $con->{status})[0]);
+ $state_uuid = $con->{status}->{$key}->{Value};
+ } else {
+ # variable not found
+ $found = 0;
+ }
+
+ mysql_query($con, "SHOW STATUS LIKE 'wsrep_last_committed'");
+ if (scalar keys($con->{status})) {
+ my $key= ((keys $con->{status})[0]);
+ $last_committed = $con->{status}->{$key}->{Value};
+ } else {
+ # variable not found
+ $found = 0;
+ }

- if (!defined($state_uuid) || !defined($last_committed)) {
+ if (!$found || !defined($state_uuid) || !defined($last_committed)) {
         my $now = current_time();

         print STDERR "$now $prefix Failed to get master wsrep state " .