fsck.f2fs: fix summary block
fsck.f2fs: fix summary block

Previously, if data and node summary was corrupted, the block was deallocated.
But, this patch fixes their summary first, so that we can keep their blocks.

Change-Id: I36a97ba675121efa441734414a49272049f4a464
Signed-off-by: Jaegeuk Kim <71255387a32c360dfbe6dfb7aaeb123bf1dc8cb6@kernel.org>

TeamExodus/external_f2fs-tools,blastagator/cm_external_f2fs-tools,NamelessRom/android_external_f2fs-tools,PAC-ROM/android_external_f2fs-tools,PAC-ROM/android_external_f2fs-tools,NamelessRom/android_external_f2fs-tools,TeamExodus/external_f2fs-tools,blastagator/cm_external_f2fs-tools