pom typo fix for pyspark profile

Very small typo fix for pom.xml

Author: Felix Cheung <felixcheung_m@hotmail.com>

Closes #196 from felixcheung/pomfix and squashes the following commits:

e9516f9 [Felix Cheung] pom typo fix for pyspark profile

spark/pom.xml

@@ -761,7 +761,7 @@
                   <directory>${basedir}/../python/build</directory>
                 </fileset>
                 <fileset>
-                  <directory>${project.build.direcoty}/spark-dist</directory>
+                  <directory>${project.build.directory}/spark-dist</directory>
                 </fileset>
               </filesets>
             </configuration>