devtool: modify command fails to ignore source files

devtool: modify command fails to ignore source files

With recent changes to recipeutils, the list of local files returned
by get_recipe_local_files could possibly include source files. This
only happens when the recipe contains a SRC_URI using subdir= to put
files in the source tree. These files should be ignored when
populating the list of local files for oe-local-files directory.

[YOCTO #10326]

introduced in
OE-Core revision 9069fef5dad5a873c8a8f720f7bcbc7625556309

(From OE-Core rev: 31f1bbad248c36a8c86dde4ff57ce42efc664082)

Signed-off-by: Stephano Cetola <stephano.cetola@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>