pango: added gtk-doc and gobject-introspection to makedepends

pango will not autoreconf without gtk-doc and gobject-introspection
packages installed.

Partially closes http://github.com/ntd/aur-fedora-mingw/issues/1
gtk3: added gtk-doc and gobject-introspection to makedepends

gtk3 will not autoreconf without gtk-doc and gobject-introspection
packages installed.

Closes http://github.com/ntd/aur-fedora-mingw/issues/1
atk: updated makedepends for autoreconf
glib: added gtk-doc and gobject-introspection to makedepends

glib will not autoreconf without gtk-doc package installed.
gtk2: added gtk-doc and gobject-introspection to makedepends

gtk2 will not autoreconf without gtk-doc and gobject-introspection
packages installed.