xcb-util-xrm-1.2-bp153.1.21

- Add explicit m4 BuildRequires: m4 is no longer default present in
  buildroot.

- update to 1.2
- fixes Parse entries with empty value correctly

- Trim description. Disable static libraries, remove .la files.

- Fix Requires %{clib}

- Mention xrm in description

- Initial package for version 1.0