HTRACE-65 Add a basic BUILDING.txt
diff --git a/htrace-core/pom.xml b/htrace-core/pom.xml
index 2c2b85e..86bc920 100644
--- a/htrace-core/pom.xml
+++ b/htrace-core/pom.xml
@@ -114,9 +114,10 @@
                   <arg value="-c"/>
                   <arg value="./gobuild.sh clean"/>
                 </exec>
-                <exec executable="bash" failonerror="true" dir="${basedir}/src/go">
-                  <arg value="-c"/>
-                  <arg value="rm -f ./bin/*"/>
+                <exec executable="git" failonerror="true" dir="${basedir}/src/go">
+                  <arg value="clean"/>
+                  <arg value="-ffqdx"/>
+                  <arg value="."/>
                 </exec>
               </tasks>
             </configuration>
diff --git a/src/main/assembly/src.xml b/src/main/assembly/src.xml
index fecbf5d..605e808 100644
--- a/src/main/assembly/src.xml
+++ b/src/main/assembly/src.xml
@@ -43,6 +43,7 @@
               <exclude>.gitignore</exclude>
               <exclude>.settings/</exclude>
               <exclude>**/src/go/bin/**</exclude>
+              <exclude>**/src/go/pkg/**</exclude>
             </excludes>
           </fileSet>
         </fileSets>
@@ -80,6 +81,7 @@
         <include>NOTICE.txt</include>
         <include>CHANGES.txt</include>
         <include>DISCLAIMER.txt</include>
+        <include>BUILDING.txt</include>
         <include>README.md</include>
       </includes>
       <fileMode>0644</fileMode>