Remove redundant call to mkdir

[jubalh]

It should be enough like this since mkdir will create all the
directories because we use the -p flag.

I guess the problem just happened because we touched a file already in a
directory that might not exist. By having:
-touch $(DESTDIR)${sysconfdir}/odbcinst.ini
before the mkdir call.

[lurcher]

Yep I know, but I thought it was more obvious to the reader what it was doing the way I wrote it.