Rename mem.bswapAllFields to byteSwapAllFields
To match the renaming of `@bswap` to `@byteSwap` in
https://github.com/ziglang/zig/commit/1fdb24827fb51351d5e31103069619668fae31c4.
63ee6e6625John Schmidt committed on 1/29/2022, 2:03:21 AM· committed by Andrew Kelleyparent39083c3