avoid linking against ___cxa_guard_acquire
avoid linking against ___cxa_guard_acquire

and ___cxa_guard_release. Fixes build with clang on OSX.

tresf/libsoundio,island-org/libsoundio,bestwpw/libsoundio,adrian-stepien/libsoundio,andrewrk/libsoundio,gityf/libsoundio,tmatth/libsoundio,gityf/libsoundio,bestwpw/libsoundio,adrian-stepien/libsoundio,vanloswang/libsoundio,WilliamRen/libsoundio,davidgranstrom/libsoundio,davidgranstrom/libsoundio,vanloswang/libsoundio,weizhiwu/libsoundio,tresf/libsoundio,island-org/libsoundio,shaunstanislaus/libsoundio,shaunstanislaus/libsoundio,weizhiwu/libsoundio,andrewrk/libsoundio,tmatth/libsoundio,WilliamRen/libsoundio