bitbake: command.py: Unlock function included into CommandsSync class

Function which calls cooker's unlock method, which in turn unlocks bitbake.lock
file.

(Bitbake rev: e97a9f1528d77503b5c93e48e3de9933fbb9f3cd)

Signed-off-by: Leonardo Sandoval <leonardo.sandoval.gonzalez@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/command.py

@@ -267,6 +267,12 @@ class CommandsSync:
         features = params[0]
         command.cooker.setFeatures(features)
 
+    def unlockBitbake(self, command, params):
+        """
+        Unlock bitbake.lock file
+        """
+        command.cooker.unlockBitbake()
+
     # although we change the internal state of the cooker, this is transparent since
     # we always take and leave the cooker in state.initial
     setFeatures.readonly = True