bson: start with 64 byte allocation once growing out of inline buffer.
bson: start with 64 byte allocation once growing out of inline buffer.

The inline buffer is 44 bytes, and 64 is the nearest power of two greater.

paulmelnikow/libbson,mongodbinc-interns/libbson,ajdavis/libbson,Machyne/libbson,paulmelnikow/libbson,mongodbinc-interns/libbson,derickr/libbson,hanumantmk/libbson,alexeyvo/libbson,rayyang2000/libbson,hanumantmk/libbson,remicollet/libbson,4Second2None/libbson_tmp,rcsanchez97/libbson,bjori/libbson,bjori/libbson,remicollet/libbson,mongodbinc-interns/libbson,4Second2None/libbson_tmp,paulmelnikow/libbson,mongodb/libbson,jqk6/libbson,mapr/libbson,paulmelnikow/libbson,mongodb/libbson,rcsanchez97/libbson,mapr/libbson,jqk6/libbson,jqk6/libbson,remicollet/libbson,Convey-Compliance/libbson,4Second2None/libbson_tmp,rayyang2000/libbson,alexeyvo/libbson,mongodbinc-interns/libbson,ajdavis/libbson,paulmelnikow/libbson,ksuarz/libbson,jqk6/libbson,rayyang2000/libbson,Machyne/libbson,hanumantmk/libbson,rcsanchez97/libbson,ksuarz/libbson,mapr/libbson,Machyne/libbson,derickr/libbson,Machyne/libbson,derickr/libbson,ksuarz/libbson,hanumantmk/libbson,mongodb/libbson,alexeyvo/libbson,Convey-Compliance/libbson,rayyang2000/libbson,Convey-Compliance/libbson,4Second2None/libbson_tmp,derickr/libbson,remicollet/libbson,ajdavis/libbson,bjori/libbson