update-alternatives: try to update FILES_${PN} when renaming a file

update-alternatives: try to update FILES_${PN} when renaming a file

When using update-alternatives, FILES_${PN} must be
referencing the new name after update-alternatives has
renamed files.

This is more or less OK when having static lists of files to
be packaged into a package, but makes it quite hard to
dynamically generate FILES_${PN}, e.g. using do_split_packages(),
as in that case we can not easily modify what goes into
FILES_${PN}, because that list is based on filenames as seen
at the time do_split_packages() is executing.

Of couse one could explicitly specify the (renamed) file(s)
in the recipe, but that contradicts the intended usage of
do_split_packages().

Instead, if FILES_${PN} contains the file name as it was pre
renaming, we here modify this to reflect the new name.

This will allow usage of do_split_packages() to populate
FILES_${PN}.

[YOCTO #13058]

(From OE-Core rev: 5c23fe378732038643a450cbf916334d24764b70)

Signed-off-by: André Draszik <andre.draszik@jci.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>