bitbake: codeparser: Fix var_execs to append to execs, not references

When using the "execs" information in new code, it became clear that
the returned data was incorrect and there were missing exec'd functions.
This corrects the error and changes one of the test results to match
the correct behaviour.

(Bitbake rev: 8a24f2d3b735bbc59ca4a09670cabbadb1868c1a)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/codeparser.py

@@ -186,7 +186,7 @@ class PythonParser():
             if n.__class__.__name__ == "Call":
                 self.visit_Call(n)
 
-        self.references.update(self.var_execs)
+        self.execs.update(self.var_execs)
 
         codeparsercache.pythoncacheextras[h] = {}
         codeparsercache.pythoncacheextras[h]["refs"] = self.references

bitbake/lib/bb/tests/codeparser.py

@@ -236,7 +236,8 @@ be. These unit tests are testing snippets."""
             self.d.setVar("do_something", "echo 'hi mom! ${FOO}'")
             self.d.setVarFlag("do_something", etype, True)
             self.parseExpression("bb.build.exec_func('do_something', d)")
-            self.assertReferences(set(["do_something"]))
+            self.assertReferences(set([]))
+            self.assertExecs(set(["do_something"]))
 
     def test_function_reference(self):
         self.context["testfunc"] = lambda msg: bb.msg.note(1, None, msg)