sbc is crashing due to GCC 5+ generating incorrect code. A patch [1] to fix
this was submitted to upstream sbc but there hasn't been any follow up [2].
This patch has been tested with gcc 8.2.0-r1. Before applying this
patch bluetooth a2dp audio on an arm device does not work. pulseaudio
will crash in sbc_analyze_eight_armv6. After applying this patch bluetooth
a2dp audio works.
[1] https://marc.info/?l=linux-bluetooth&m=152535913710490&w=2
[2] https://marc.info/?l=linux-bluetooth&m=154464978110178&w=2
