mkfs, fsck: change the results for readability

This patch cleans up several printing formats.

Change-Id: Ief238c844b61e89d8c901c01a904849f6d86acd5
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
f2fstat: fix command-line options

In ARM, the char type is always defined as unsigned (which is allowed
by the C standard).  This caused the terminator return value of getopt (-1)
was being converted to 255 and thus never matched the loop exit condition.

Also printfs warning 'unknown option' has been removed from all the tools
because getopt() itself warns with a message.

Change-Id: I15e6b63162d3db0b07eff6810829fb5d38e5d699
f2fs-tools: create dump.f2fs symlink

Change-Id: Iac06fa3bc687fee5454e481b7d27eccc544ffe12