Snippets for alsa-plugins 1.2.12 from Alpine armv7

Sourced from https://build.alpinelinux.org/buildlogs/build-edge-armv7/community/alsa-plugins/alsa-plugins-1.2.12-r2.log.

• /usr/include/sys/poll.h:1:2: warning: #warning redirecting incorrect #include <sys/poll.h> to <poll.h> [-Wcpp]
      1 | #warning redirecting incorrect #include <sys/poll.h> to <poll.h>
        |  ^~~~~~~
  

• pcm_a52.c:1159:28: warning: assignment discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
   1159 |                 rec->codec = avcodec_find_encoder_by_name(avcodec);
        |                            ^
  

• pcm_a52.c:1161:28: warning: assignment discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
   1161 |                 rec->codec = avcodec_find_encoder_by_name("ac3_fixed");
        |                            ^
  

• pcm_a52.c:1163:36: warning: assignment discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
   1163 |                         rec->codec = avcodec_find_encoder_by_name("ac3");
        |                                    ^
  

• pcm_a52.c:1166:28: warning: assignment discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
   1166 |                 rec->codec = avcodec_find_encoder(AV_CODEC_ID_AC3);
        |                            ^
  

• pcm_a52.c:1205:9: warning: 'sample_fmts' is deprecated [-Wdeprecated-declarations]
   1205 |         rec->av_format = rec->codec->sample_fmts[0];
        |         ^~~