Add BLAKE2s support to the perf utility library. The code is borrowed from the kernel. This will replace the use of SHA-1 in genelf.c. Signed-off-by: Eric Biggers <ebiggers@kernel.org> Tested-by: Ian Rogers <irogers@google.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Fangrui Song <maskray@sourceware.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Jason A. Donenfeld <Jason@zx2c4.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Pablo Galindo <pablogsal@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>