Add fsync to readSyncBulkPayload(). (#7839)
Add fsync to readSyncBulkPayload(). (#7839)

We should sync temp DB file before renaming as rdb_fsync_range does not use
flag `SYNC_FILE_RANGE_WAIT_AFTER`.

Refer to `Linux Programmer's Manual`:
SYNC_FILE_RANGE_WAIT_AFTER
    Wait upon write-out of all pages in the range after performing any write.
neomantra/redis,yossigo/redis,antirez/redis,neomantra/redis,soloestoy/redis,charsyam/redis,oranagra/redis,yossigo/redis,PKRoma/redis,charsyam/redis,ofirluzon/redis,soloestoy/redis,neomantra/redis,PKRoma/redis,oranagra/redis,ofirluzon/redis,yossigo/redis,PKRoma/redis,oranagra/redis,charsyam/redis,soloestoy/redis,oranagra/redis,neomantra/redis,yossigo/redis,ofirluzon/redis,yossigo/redis,neomantra/redis,ofirluzon/redis,charsyam/redis,ctripcorp/redis,antirez/redis,antirez/redis,soloestoy/redis,ctripcorp/redis,antirez/redis,oranagra/redis,PKRoma/redis,ctripcorp/redis,ctripcorp/redis,PKRoma/redis,soloestoy/redis,ofirluzon/redis,charsyam/redis