Unbreak build with libc++ 16

[jbeich]

Upcoming FreeBSD 14.0 ships with libc++ 16. However, libc++ 17 isn't affected due to header bootlegging:

In file included from ../src/drm.cpp:21:
In file included from ../src/drm.hpp:11:
In file included from /usr/include/c++/v1/span:600:
In file included from /usr/include/c++/v1/functional:526:
In file included from /usr/include/c++/v1/__functional/boyer_moore_searcher.h:27:
In file included from /usr/include/c++/v1/vector:321:
In file included from /usr/include/c++/v1/__format/formatter_bool.h:20:
In file included from /usr/include/c++/v1/__format/formatter_integral.h:32:
In file included from /usr/include/c++/v1/locale:202:
In file included from /usr/include/c++/v1/__locale:21:
/usr/include/c++/v1/mutex:12:2: error: 1
   12 | #error bootlegging check
      |  ^

[emersion]

Thanks

[jbeich]

../src/reshade_effect_manager.cpp:17:10: fatal error: stb_image_resize.h: No such file or directory
   17 | #include <stb_image_resize.h>
      |          ^~~~~~~~~~~~~~~~~~~~

False negative due to CI relying on a moving target:

gamescope/subprojects/stb.wrap

Line 5 in d1eb70b

revision = master

[emersion]

Fixed in #981