Add test to check all symbols can be loaded

Summary:
make sure all symboles can be loaded to avoid issues like missing
methods in descendants of abstract base class.

Test Plan:
ran it and verified it passes; remove a method in a descendant class
and verified that the test failed.

Reviewers: epriestley, nh

Reviewed By: nh

CC: aran, nh, jungejason

Differential Revision: 1023

scripts/install/update_phabricator.sh

@@ -25,6 +25,13 @@ fi
 (cd $ROOT/phabricator && git pull && git submodule update --init)
 
 
+### RUN TESTS ##################################################################
+
+# This is an acceptance test that makes sure all symboles can be loaded to
+# avoid issues like missing methods in descendants of abstract base class.
+(cd $ROOT/phabricator && ../arcanist/bin/arc unit src/infrastructure/__tests__/)
+
+
 ### GENERATE DOCUMENTATION #####################################################
 
 # This generates documentation if you have diviner/ checked out. You generally
@@ -38,6 +45,7 @@ then
   (cd $ROOT/phabricator && $ROOT/diviner/bin/diviner .)
 fi
 
+
 ### CYCLE APACHE AND DAEMONS ###################################################
 
 # Stop Apache. Depening on what system you're running, you may need to use