* gir/gimarshallingtests.[hc]: Add a test for GStrv in function args and
as struct fields.

* girepository/giroffsets.c: Correctly compute the size of structs with
  array fields

* girepository/girparser.c: Set is_pointer to FALSE for arrays with
  fixed size that are inside structs.

* giscanner/glibtransformer.py: Special case GStrv as arrays of utf8.

* giscanner/annotationparser.py: Make full transfer the default for
arrays of char* returned by functions.

https://bugzilla.gnome.org/show_bug.cgi?id=620170