Use system call I/O in PosixSequentialFile instead of libc stdio to avoid extra buffer copies and FreeBSD stdio open file limits#14229

svenski123 wants to merge 1 commit intofacebook:mainfacebook/rocksdb:mainfrom

svenski123:posix-seq-file-stdio-fixupsvenski123/facebook_rocksdb:posix-seq-file-stdio-fixupCopy head branch name to clipboard