utils/getdeveloperlib.py: fix developer being reported for unrelated path

Currently, by following the instructions in the manual and querying for
developers for a patch that changes path
package/foobar
the script reports both developers that have these entries in the
DEVELOPERS file:
F:	package/foo/
F:	package/foobar/

Starting from commit "afc112b0e4 utils/getdeveloperlib.py: fix issue
with hasfile()" get-developers script uses os.path.abspath() and
os.path.relpath().
The catch is that those functions return the absolute path and the
relative path without the trailing slash.

When the paths associated to a developer are then compared to the paths
a patch touches, using the string.startswith(), any substring returns
True, leading to developers for package/foo/ being wrongly reported
for package/foobar/ .

Fix this by re-adding the trailing slash after using relpath().

Signed-off-by: Ricardo Martincoski <ricardo.martincoski@gmail.com>
Cc: Heiko Thiery <heiko.thiery@gmail.com>
Cc: James Knight <james.d.knight@live.com>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
(cherry picked from commit 29bb478a49)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

utils/getdeveloperlib.py

@@ -254,6 +254,8 @@ def parse_developers():
                 for f in dev_files:
                     dev_file = os.path.relpath(f, brpath)
                     dev_file = dev_file.replace(os.sep, '/')  # force unix sep
+                    if f[-1] == '/':  # relpath removes the trailing /
+                        dev_file = dev_file + '/'
                     files.append(dev_file)
             elif line == "":
                 if not name: