The service-specific implementation header needs to include only the raw
enums/flags headers; while the source needs to include the enum/flags types
headers.
This message requires 64-bit flags values, which cannot be supported by GLib's
GFlagsClass/GFlagsValue. Therefore, we tell `glib-mkenums' to skip those enums,
and just provide the helper _build_string_from_mask() method ourselves.
Instead of keeping the libqmi-glib sources under `src', we'll have a more
specific `libqmi-glib' directory instead.
Also, update autotools to reflect as `libqmi' the name of the project.