bitbake/data.py: Add emit_func() and generate_dependencies() functions

These functions allow generation of dependency data between funcitons and
variables allowing moves to be made towards generating checksums and allowing
use of the dependency information in other parts of bitbake.

Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

bitbake/lib/bb/parse/ast.py

@@ -323,6 +323,8 @@ def finalize(fn, d):
     tasklist = bb.data.getVar('__BBTASKS', d) or []
     bb.build.add_tasks(tasklist, d)
 
+    #bb.data.generate_dependencies(d)
+
     bb.event.fire(bb.event.RecipeParsed(fn), d)
 
 def _create_variants(datastores, names, function):