bitbake: siggen: Ensure taskdata default functions exist in base class

The get/set_taskdata functions are now part of the API of the class,
ensure they exist in the base class definition so the noop handler
works.

[YOCTO #7233]

(Bitbake rev: 9b5b1bd7d77e3f5886f6c557d3b750de1f6d6025)

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

bitbake/lib/bb/siggen.py

@@ -62,6 +62,13 @@ class SignatureGenerator(object):
     def dump_sigs(self, dataCache, options):
         return
 
+    def get_taskdata(self):
+       return (self.runtaskdeps, self.taskhash, self.file_checksum_values)
+
+    def set_taskdata(self, data):
+        self.runtaskdeps, self.taskhash, self.file_checksum_values = data
+
+
 class SignatureGeneratorBasic(SignatureGenerator):
     """
     """
@@ -204,12 +211,6 @@ class SignatureGeneratorBasic(SignatureGenerator):
         #d.setVar("BB_TASKHASH_task-%s" % task, taskhash[task])
         return h
 
-    def get_taskdata(self):
-       return (self.runtaskdeps, self.taskhash, self.file_checksum_values)
-
-    def set_taskdata(self, data):
-        self.runtaskdeps, self.taskhash, self.file_checksum_values = data
-
     def dump_sigtask(self, fn, task, stampbase, runtime):
         k = fn + "." + task
         if runtime == "customfile":