devtool: upgrade: fix removing other recipes from workspace on reset
If you did a "devtool add" followed by "devtool upgrade" and then did
a "devtool reset" on the recipe you upgraded, the first recipe would
also be deleted from the workspace - this was because we were
erroneously adding the entire "recipes" subdirectory and its contents to
be tracked for removal on reset. Remove the unnecessary call to
os.path.dirname() that caused this.
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
