Work around cmake reporting include paths in random order to Qt Creator
due to a bug in the CodeBlocks generator.

Remove the tool chains include paths from the list reported by cmake and
have the code model add those again later. That keeps at least the
include paths of the compiler in order, which is important as this
makes sure any fixed headers shipped with the compiler actually get
picked up.

Task-number: QTCREATORBUG-16432
Change-Id: I218735914bcc750ce87b02b05d111f3fe2bb5644
Reviewed-by: Tim Jenssen <tim.jenssen@theqtcompany.com>