bitbake: cooker: pass exception to finishAsyncCommand

An invalid task causes bitbake to exit incorrectly, firing a
CommandCompleted event rather than a CommandFailed one. This
means that clients listening for CommandFailed events are
unable to detect the build failure even though one occurred.

Passing an exception string to finishAsyncCommand when a task
fails causes the CommandFailed event to be fired correctly.

[YOCTO #9087]

(Bitbake rev: 98a2c37e077b16e3bc8bb102bd18b293130d15a4)

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

bitbake/lib/bb/cooker.py

@@ -1349,7 +1349,7 @@ class BBCooker:
                 failures += len(exc.args)
                 retval = False
             except SystemExit as exc:
-                self.command.finishAsyncCommand()
+                self.command.finishAsyncCommand(str(exc))
                 return False
 
             if not retval:
@@ -1385,7 +1385,7 @@ class BBCooker:
                 failures += len(exc.args)
                 retval = False
             except SystemExit as exc:
-                self.command.finishAsyncCommand()
+                self.command.finishAsyncCommand(str(exc))
                 return False
 
             if not retval: