Log Message:
cairomm1.16: update to 1.16.1.

1.16.1 (stable):

Cairo:
* Surface::Type: Deprecate WIN32, add WIN32_SURFACE
  (Kjell Ahlstedt) Issue #26, merge request !14

Build:
* cairommconfig.h.*: Don't dllimport on MinGW
  (Chun-wei Fan) Merge reqest !16
  (Chun-wei Fan) Issue gtkmm#90 (Lukas K.)
* Meson build: Make it possible to use cairomm as a subproject
  (Kjell Ahlstedt)
* Meson build: No implicit_include_directories
  (Kjell Ahlstedt)
* MSVC build: exception.h: Export Cairo::logic_error selectively
  (Chun-wei Fan) Merge request !17