The data displayed by the depexp UI is buggy, bitbake can't convey
accurate runtime dependency information.
Convert the UI to become taskexp ("Task Explorer") which provides
a graphical way of exploring the task-depends.dot file. This data
is accurate and being able to visualise the data is an often requested
feature as standard dot file viewers can't usualy cope.
(Bitbake rev: 416a496edc692982af2feec768ac4df8fb799853)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>