- Udpate to 0.19.1 with following bug fixes:
* buildcache create: make "file exists" less verbose
* spack mirror create: don't change paths to urls
* Improve error message for requirements
* Fix libtool filter for Fujitsu compilers
* FileCache: delete the new cache file on exception
- using `--all` flag for `spack external find` in the %triggrin
section, as MPI packages were not recognized any more, fixing
(bsc#1208751)