libdmtx-0.7.4-3.1

- Fix the SLES build (%make_install not expanded)
- Fix a couple rpmlint warnings

- change license to be in spdx.org format

- make snprintf available to the sources

- Update to 0.7.4
  library: Relicensed to use Simplified BSD with waiver option
  library: Added new error codes and messages in dmtxencode.c
  library: Added DmtxByteList struct and supporting functions
  library: Changed file header with updated text
  library: Fixed ECC bug for 144x144 case (thanks Huver!)
  library: New Reed Solomon implementation
  library: New repository structure: libdmtx, dmtx-utils, and dmtx-wrappers

- Add dmtx.

- Update RPM group and use a source URL

- Add few patches to improve funcitonality bnc#881387:
  * libdmtx-DmtxPropRowPadBytes.patch
  * libdmtx-explicit-cast.patch
  * libdmtx-mosaic.patch

- Add baselibs.conf, needed for kdebase4-workspace-libs-32bit