Accepting request 1164597 from home:dancermak:branches:Base:System

- switch to obs_scm
- don't abuse %bcond for multibuild
- add rpmlintrc for dubious rpmlint warning
- add a package suffix for the multibuild lang flavor

OBS-URL: https://build.opensuse.org/request/show/1164597
OBS-URL: https://build.opensuse.org/package/show/Base:System/xz?expand=0&rev=158

xz-rpmlintrc

@@ -0,0 +1,4 @@
+# rpmlint freaks out because we declare the lang multibuild as noarch and
+# %_libdir is archspecific, but we either exclude %_libdir or it's in the part
+# belonging to the archfull build
+addFilter("libdir-macro-in-noarch-package.*%{_libdir}")