Added C implementation of DeltaBlue

From: https://github.com/xxgreg/deltablue/commit/fabf6f124ad1c0a2675070fbf5a40e5ed6f629fb
Unchanged, original version from the above source

Signed-off-by: Stefan Marr <git@stefan-marr.de>
Added C version of Richards benchmark

Directly coming from http://www.cl.cam.ac.uk/~mr10/Bench.html
File date is 19th of July 2007.

Signed-off-by: Stefan Marr <git@stefan-marr.de>
Renamed wait to wait_task to avoid name clash with system's wait function

Think wait_task is more like in the other implementations, too.

Signed-off-by: Stefan Marr <git@stefan-marr.de>
Fixed clang's complained about missing include

Signed-off-by: Stefan Marr <git@stefan-marr.de>
Changed harness to be the standard ReBench compatible one

- also use the same timing approach as the other C benchmarks (Mandelbrot at the moment)

Signed-off-by: Stefan Marr <git@stefan-marr.de>
Fixed typo

Signed-off-by: Stefan Marr <git@stefan-marr.de>
Added same benchmark harness to Richards, and disabled output

Signed-off-by: Stefan Marr <git@stefan-marr.de>
Updated makefile

Signed-off-by: Stefan Marr <git@stefan-marr.de>
Added binaries to .gitignore

Signed-off-by: Stefan Marr <git@stefan-marr.de>