CDRIVER-950: BSON_PTHREAD_ONCE_INIT_NEEDS_BRACES redefined
CDRIVER-950: BSON_PTHREAD_ONCE_INIT_NEEDS_BRACES redefined

mapr/libbson,Convey-Compliance/libbson,ajdavis/libbson,mapr/libbson,paulmelnikow/libbson,mongodb/libbson,alexeyvo/libbson,bjori/libbson,alexeyvo/libbson,ajdavis/libbson,Convey-Compliance/libbson,mapr/libbson,paulmelnikow/libbson,ajdavis/libbson,rcsanchez97/libbson,alexeyvo/libbson,mongodb/libbson,ksuarz/libbson,rcsanchez97/libbson,Convey-Compliance/libbson,rcsanchez97/libbson,ksuarz/libbson,bjori/libbson,paulmelnikow/libbson,paulmelnikow/libbson,mongodb/libbson,bjori/libbson,ksuarz/libbson,paulmelnikow/libbson