bitbake: runqueue/bitbake-worker: Fix dry run fakeroot issues

When using the dry run option (-n), bitbake would still try and fire
a specific fakeroot worker. This is doomed to failure since it might
well not have been built.

Add in some checks to prevent the failures.

[YOCTO #5367]

(Bitbake rev: f34d0606f87ce9dacadeb78bac35879b74f10559)

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

bitbake/bin/bitbake-worker

@@ -97,7 +97,8 @@ def fork_off_task(cfg, data, workerdata, fn, task, taskname, appends, quieterror
         except TypeError:
              umask = taskdep['umask'][taskname]
 
-    if 'fakeroot' in taskdep and taskname in taskdep['fakeroot']:
+    # We can't use the fakeroot environment in a dry run as it possibly hasn't been built
+    if 'fakeroot' in taskdep and taskname in taskdep['fakeroot'] and not cfg.dry_run:
         envvars = (workerdata["fakerootenv"][fn] or "").split()
         for key, value in (var.split('=') for var in envvars):
             envbackup[key] = os.environ.get(key)