zstd-1.3.1-2.1

- Update to v1.3.1
  * License is now BSD + GPL-2.0
  * See https://github.com/facebook/zstd/releases for the
    complete changelog.

- Update to v1.1.4
  See https://github.com/facebook/zstd/releases for details.
- Drop zstd-lib-no-rebuild.patch

- Fix group name for the shared library

- Update to version 1.1.1
  * New : cli commands -M#, --memory=, --memlimit=,
  - -memlimit-decompress= to limit allowed memory consumption
    during decompression
  * Improved : slightly better compression ratio at --ultra levels
  * Improved : better memory usage when using streaming
    compression API
  * Added : API : ZSTD_initCStream_usingCDict(),
    ZSTD_initDStream_usingDDict() (experimental section)
  * Changed : zstd_errors.h is now installed within /include
    (and replaces errors_public.h)
  * Fixed : several sanitizer warnings

- Update descriptions

- initial package version 1.1.0
  based on https://pbrady.fedorapeople.org/zstd.spec