devtool: upgrade: automatically handle changes to source subdirectory
If the directory where the source code extracts to changes (for
example, when upgrading iucode-tool from 1.5 to 2.1.1, the subdirectory
in the tarball changed from "iucode_tool-${PV}" to "iucode-tool-${PV}")
then handle this automatically. Also handle when it changes to match the
default S value (i.e. "${WORKDIR}/${BP}") in which case we just drop
setting S in the recipe.
Fixes [YOCTO #10939].
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
