fix avro build

BUILD/install_build_deps.sh

@@ -120,10 +120,11 @@ then
     exit 1
 fi
 avro_filename=`ls -1 *.tar.gz`
+avro_die=`echo "$avro_finema" | sed "s/.tar.gz//"`
 
 tar -axf $avro_filename
-mkdir $avro_filename/build
-pushd $avro_filename/build
+mkdir $avro_dir/build
+pushd $avro_dir/build
 cmake .. -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_C_FLAGS=-fPIC -DCMAKE_CXX_FLAGS=-fPIC
 make
 sudo make install