correct Makefile

Signed-off-by: Sebastien Varrette <sebastien.varrette@uni.lu>
Patch bump to version 0.1.1-b51

Signed-off-by: Sebastien Varrette <sebastien.varrette@uni.lu>
Merge branch 'release/0.1.1-b51' into devel

* release/0.1.1-b51:
  Patch bump to version 0.1.1-b51