Suggested usage notes:

${MINGW_PACKAGE_PREFIX}-wxwidgets3.2-gtk3-libs installs the wxGTK DLLs.
And, when creating an MinGW package, this package should be added to
depends, unless the package only needs static wxGTK libraries.

${MINGW_PACKAGE_PREFIX}-wxwidgets3.2-gtk3 installs the wxGTK
packages normally needed to build an wxGTK project. And, when creating
an MinGW package, this package should be added to makedepends.
