[NO ISSUE] Tweak source assembly

The source assembly configuration was including target
directories in other modules, which was making the
source package too large to submit to ASF SVN

Change-Id: I67319e1cb46b439e823113decb9bb0cd8e929352
Reviewed-on: https://asterix-gerrit.ics.uci.edu/2771
Sonar-Qube: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Till Westmann <tillw@apache.org>
Tested-by: Ian Maxon <imaxon@apache.org>
diff --git a/hyracks-fullstack/src/main/assembly/source.xml b/hyracks-fullstack/src/main/assembly/source.xml
index 4d668ce..21f4b18 100644
--- a/hyracks-fullstack/src/main/assembly/source.xml
+++ b/hyracks-fullstack/src/main/assembly/source.xml
@@ -25,7 +25,7 @@
       <outputDirectory>/</outputDirectory>
       <useDefaultExcludes>true</useDefaultExcludes>
       <excludes>
-        <exclude>${project.build.directory}/**</exclude>
+        <exclude>**/${project.build.directory}/**</exclude>
         <exclude>release.properties</exclude>
       </excludes>
     </fileSet>