test-cpu-set-util: add a smoke test for test_parse_cpu_set_extend()
(cherry picked from commit b54d7241f25b859c6c008e516c2131c39902e6e4)
Related: #1734787
patch_name: 0275-test-cpu-set-util-add-a-smoke-test-for-test_parse_cp.patch
present_in_specfile: true
location_in_specfile: 275
squash_commits: true