tests: workaround -Wimplicit-function-declaration in system/audio.h
system/audio.h uses strdup(), but it's exposed only with _POSIX_C_SOURCE at least 200809L. So define that.
Please disregard branch name.
Edited by Ratchanan Srirattanamet
system/audio.h uses strdup(), but it's exposed only with _POSIX_C_SOURCE at least 200809L. So define that.
Please disregard branch name.