Revert "Add install path to link dirs"

This reverts commit 815f14dc.

Guilherme, do you remember why you added this?

The negative side effect is that during the build the executable are linked against the shared library already in the install directory ... but those are by definition usually obsolete since they will be update all after all the target have successfully build.

In my case, this was leading to a hard to diagnose 'missing symbol' complain when linking the executables.