Making a properly installed libQtBootstrap simplifies
our tools build process a little and in addition allows
other comand line tools to use the bootstrap lib and
link against it.

Initial-version-by: Lars Knoll
Change-Id: Iddf4568a5505bc24898ec1abf7e7022e19f0a454
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>