Update sdl2-mixer for android builds
authoradvil <rawlins@gmail.com>
Sun, 18 Apr 2021 21:56:07 +0000 (17:56 -0400)
committeradvil <rawlins@gmail.com>
Mon, 3 May 2021 19:23:26 +0000 (15:23 -0400)
commit0a9fa4a7809f0ff3c69f67e185ec936c6346bafb
tree5d64adf2c2c6030923d6223c549582ee7b306a06
parenta4d602e826b386e8f02f7ce52de753b89698f9ab
Update sdl2-mixer for android builds

Per #1892.
crawl-ref/source/contrib/sdl2-mixer