f2fs-tools: get kernel version via uname(2)

This patch introduces uname(2) to get kernel version.

Bug: 78358575
Change-Id: Ib50cbbc33f55cb3063a71eaf49a247f070bacf23
Merged-In: Ib50cbbc33f55cb3063a71eaf49a247f070bacf23
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
5 files changed