Makefile fix

The -std=c99 flag is now always used (see 093dec4).
This release is made to make this last fix available as soon as possible in spack.

Fixes to performance summary

2021-07-31

New shoplifted version (updated to thin@57ea74406)

Random matrix initialisation.

Hopefully more consistent results (in terms of number of iterations).

First shoplifted release

2021-07-08

Shoplifted version - 2021-07-08

version 1.0 release

update MkFlags examples