Makefile: fix directory creation
authorAntonio Ospite <ospite@studenti.unina.it>
Tue, 19 Nov 2013 13:57:50 +0000 (14:57 +0100)
committerAntonio Ospite <ospite@studenti.unina.it>
Tue, 19 Nov 2013 13:57:50 +0000 (14:57 +0100)
Also use lower case for path variables, this mimics somehow how
autotools does it.


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