scripts: add script for listing closed bugs

Script to be used when creating a release. For regular releases this can
be called this way:

$ list_issues.py -f issues.md -s 2019-09-01

Will list all closed issues since september 1st, 2019 and will create a
markdown file with all issues that can be added as is to the release
notes.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>
diff --git a/CODEOWNERS b/CODEOWNERS
index ff75be8..99a3411 100644
--- a/CODEOWNERS
+++ b/CODEOWNERS
@@ -326,6 +326,7 @@
 /scripts/sanity_chk/expr_parser.py        @nashif
 /scripts/gen_app_partitions.py            @andrewboie
 /scripts/dts/                             @ulfalizer @galak
+/scripts/release/                         @nashif
 /arch/x86/gen_gdt.py                      @andrewboie
 /arch/x86/gen_idt.py                      @andrewboie
 /scripts/gen_kobject_list.py              @andrewboie