Snippets for aom 3.12.1 from Nix aarch64-darwin

Sourced from https://hydra.nixos.org/log/4kbvg6vb4420q29rnb375v9wqwi611nj-libaom-3.12.1.drv.

• /nix/var/nix/builds/nix-87566-883043074/source/aom_dsp/grain_table.c:39:35: warning: initializer-string for character array is too long, array size is 8 but initializer has size 9 (including the null terminating character); did you mean to use the 'nonstring' attribute? [-Wunterminated-string-initialization]
     39 | static const char kFileMagic[8] = "filmgrn1";
        |                                   ^~~~~~~~~~