qt5-static: Include the module itself as a dependency

.. so that it makes it into .cmake files, e.g.:

set(_Qt5Core_LIB_DEPENDENCIES "Qt5::Core")

Without this, for example, ws2_32 isn't linked into static
executables that use only Qt5Core.
winico: new package
Merge pull request #301 from oscarfv/winico

winico: new package