devtool: reset: run bitbake -c clean on recipe

If you've added a new recipe, you want the output cleaned when you do
devtool reset, otherwise cruft from building the recipe may remain which
could interfere with future builds.

(From OE-Core rev: 664d1a7fe8f8288fabc582d00f6e36ab29496ec5)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oeqa/selftest/devtool.py

@@ -179,9 +179,13 @@ class DevtoolTests(oeSelfTest):
                 if line.startswith('.TH'):
                     self.assertEqual(line.rstrip(), '.TH MDADM 8 "" v9.999-custom', 'man file not modified')
         # Test devtool reset
+        stampprefix = get_bb_var('STAMP', 'mdadm')
         result = runCmd('devtool reset mdadm')
         result = runCmd('devtool status')
         self.assertNotIn('mdadm', result.output)
+        self.assertTrue(stampprefix, 'Unable to get STAMP value for recipe mdadm')
+        matches = glob.glob(stampprefix + '*')
+        self.assertFalse(matches, 'Stamp files exist for recipe mdadm that should have been cleaned')
 
     def test_devtool_update_recipe(self):
         # Check preconditions