btrfs-tools: upgrade 6.0.1 -> 6.0.2

Changelog:
==========
* fixes:
   * resize cancel did not work in some cases
   * fix fileattr stream command format and add workaround when it cannot be applied
   * properly handle degraded raid56 reads
   * fi defrag: fix verbosity, don't print file names by default
   * receive: fix silent data loss after fall back from encoded write
* fi mkswapfile: new command to create a formatted swapfile in one go

Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>