Fix execution of magellan/configure.sh in common/configure.sh

git-svn-id: https://svn.mcs.anl.gov/repos/darshan/trunk@515 3b7491f3-a168-0410-bf4b-c445ed680a29

darshan-test/automated/common/configure.sh

@@ -7,7 +7,7 @@ status=0
 
 if [[ $NODE_LABELS =~ "magellan" ]];
 then
-  darshan-test/automated/magellan/configure.sh
+  source darshan-test/automated/magellan/configure.sh
   status=$?
 else
   # unknown machine