Some tasks were not being marked as covered/notcovered since internal
calls were being made without using the external call points.
Fix the accounting issues by using the correct external call points.
(Bitbake rev: fe0a7be03e8baed22f6b0915cd5f7956ba3fbf83)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>