Fixed two minor bugs.

Details:
- Fixed a bug in the test suite for the trsm_ukr and gemmtrsm_ukr test
  modules whereby the uplo bits of some packed matrix objects were not
  being set properly, resulting in false FAILURE results for those
  tests. Thanks to Tyler Smith for bringing this issue to my attention.
- Fixed a bug in bli_obj_alloc_buffer() that caused an unnecessary
  "not yet implemented" abort() when creating a 1x1 object with non-unit
  strides.
Merge branch 'master' of github.com:flame/blis