bin/bixo is working incorrectly with hadoop 0.20.203.0

Looks like jar file naming scheme was changed.

simple fix:

```
--- bin/bixo.fix1       2011-09-14 14:40:29.035885594 +0400
+++ bin/bixo    2011-09-14 14:41:40.798931767 +0400
@@ -97,7 +97,7 @@
 done

 # add Hadoop libs to CLASSPATH
-for f in $HADOOP_HOME/hadoop-*-core.jar; do
+for f in $HADOOP_HOME/hadoop-core-*.jar; do
   CLASSPATH=${CLASSPATH}:$f;
 done
 for f in $HADOOP_HOME/lib/*.jar; do
```
