recipetool: create: fix mapping python dependencies to python-dbg package

recipetool: create: fix mapping python dependencies to python-dbg package

When trying to map python module dependencies to the packages that
provide them, if we're looking for .so files that satisfy
dependencies then we need to exclude files found under the .debug
directory, otherwise the dependency will get mapped to the python-dbg
package which isn't correct.

For example, this fixes creating a recipe for pyserial and not getting
python-fcntl in RDEPENDS_${PN}, leading to errors when trying to use the
serial module on the target.

(From OE-Core rev: 46a068ca35975988a8e9c0310f71fdcee55937a4)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>