qtbase: Fix PACKAGECONFIG[tests]

* at least in 5.2.1 tests aren't enabled by default:
  QT_ALL_BUILD_PARTS=" libs tools examples tests "
  QT_DEFAULT_BUILD_PARTS="libs tools examples"
  so without -make option they weren't enabled even with tests in
  PACKAGECONFIG

* add options for other build parts just for completeness

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>