Update SPDX list to 3.17 for mplus license

Adopt new SPDX mplus as the standard SPDX id and move our
LicenseRef-scancode-m-plus to the "other_spdx_klicense_keys"

Signed-off-by: Philippe Ombredanne <[email protected]>

Author: pombredanne

src/licensedcode/data/licenses/m-plus.yml

@@ -3,5 +3,14 @@ short_name: M+ Fonts license
 name: M+ Fonts license
 category: Permissive
 owner: Coji Morishita
-homepage_url: http://mplus-fonts.osdn.jp
-spdx_license_key: LicenseRef-scancode-m-plus
+homepage_url: https://mplusfonts.github.io
+spdx_license_key: mplus
+other_spdx_license_keys:
+   - LicenseRef-scancode-m-plus
+faq_url: https://en.wikipedia.org/wiki/M%2B_FONTS
+other_urls:
+   - http://mplus-fonts.osdn.jp
+   - https://github.com/coz-m/MPLUS_FONTS
+   - https://fedoraproject.org/wiki/Licensing:Mplus?rd=Licensing/mplus
+
+