Make test target depend on examples

This usually won't matter but when examples involves compiled
code it is possible that the test collection phase will encounter
temporary files and fail internal consistency check.

python/lsst/sconsUtils/scripts.py

@@ -658,6 +658,7 @@ def s(ll):
             state.env.Depends(pyTest, swigMods)
             state.env.Depends(pyTest, state.targets["python"])
             state.env.Depends(pyTest, state.targets["shebang"])
+            state.env.Depends(pyTest, state.targets["examples"])
         result = ccList + pyList
         state.targets["tests"].extend(result)
         return result