a) There is a QA warning from a .so being present in a main package.
In the case of the plugin library for gcc, this is allowed.
b) Remove the unwanted libiberty.a file with the strange path. We
don't need/want this and this removes an unpackaged file warning.
(From OE-Core rev: ca36a3edf9cede9fa0d73ba1a9538ab467cb5e3c)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>