maintainers: add missing files to build system area

Add missing files to corrosponding area. Signed-off-by: Anas Nashif <anas.nashif@intel.com>

Author: nashif

MAINTAINERS.yml

@@ -739,6 +739,13 @@ Build system:
  - tests/misc/test_build/
  - tests/application_development/
  - samples/application_development/
+ - arch/archs.yml
+ - version.h.in
+ - scripts/schemas/arch-schema.yaml
+ - scripts/schemas/board-schema.yaml
+ - scripts/schemas/soc-schema.yaml
+ - scripts/list_shields.py
+ - scripts/snippets.py
  labels:
  - "area: Build System"
  tests:
@@ -874,6 +881,7 @@ Common Architecture Interface:
  - nashif
  files:
  - arch/Kconfig
+ - arch/CMakeLists.txt
  - include/zephyr/arch/
  - arch/common/
  - include/zephyr/arch/common/