devtool-source.bbclass: Only create each patch branch once
For conditonally applied patches based on SRC_URI overrides, the
devtool-source class would try to create a new branch for each override
assignment as a postfunc to do_patch, but if the same override was used
multiple times, it would try to create the same branch multiple times,
causing errors like
> Exception: bb.process.ExecutionError: Execution of
\ 'git checkout
f0f0f0f0f0ff0f0f0f0f0f0f0f0f0f0f0ff0f0f0 -b devtool-override-foo'
\ failed with exit code 128:
> fatal: A branch named 'devtool-override-foo' already exists.
This change makes sure that the devtool-source bbclass will only create
one branch per override.
Signed-off-by: Olof Johansson <olofjn@axis.com>
Reviewed-by: Peter Kjellerstedt <pkj@axis.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
