test: Skip tst_qmake::include_dir() when -no-widgets is used

Only run this test case when the widgets module is present, skip it
otherwise.

Change-Id: I84f48b670b967af3bf0701ceba5a192f33989034
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
qdoc: Allow colon characters in manifest meta attribute values

The current implementation does not allow colons in attribute values,
as it's already used as a separator in the form of 'name:value'.

This change allows colons in the value string - one use case is to
have URL attributes, as in 'imageUrl:qthelp://path.to.image'.

Change-Id: I05c5cb32ffc79a39fbe5e4102f7a4b5bdcc2be53
Reviewed-by: Martin Smith <martin.smith@digia.com>
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>