Remove the absolute RPATH to somewhere on the build machine,
which creates issues when loading Qt Creator on macOS 10.14,
and of course is bogus in any case.
Fixes: QTCREATORBUG-26196
Change-Id: Ic92deb9b2c6fe32f377fc31004779a2a43794054
Reviewed-by: Christian Stenger <christian.stenger@qt.io>