sanitycheck: don't generate the top-level Makefile in random order

Also add a "generated by sanitycheck" header to indicate origin and a
warning about the dependency required to actually run the test.

Signed-off-by: Marc Herbert <[email protected]>

Author: marc-hb

scripts/sanitycheck

@@ -1325,9 +1325,11 @@ class MakeGenerator:
             # Create our dynamic Makefile and execute it.
             # Watch stderr output which is where we will keep
             # track of build state
-            for name, goal in self.goals.items():
+            tf.write('\n# Generated by %s which is expected\n' % __file__)
+            tf.write('# to spawn qemu or testbinary, renode, etc. \n\n')
+            for name, goal in sorted(self.goals.items()):
                 tf.write(goal.text)
-            tf.write("all: %s\n" % (" ".join(self.goals.keys())))
+            tf.write("all: %s\n" % (" ".join(sorted(self.goals.keys()))))
             tf.flush()
 
             cmd = ["make", "-k", "-j", str(JOBS), "-f", tf.name, "all"]