f2fs-tools: add support for building for android

Change-Id: I11a6197c8beb0a1a430ce37f55ce1bddec0ab584
f2fs-tools: show version on all tools

Change-Id: I6e718bd42d5a4436c0247758bbed9f7de6c4aee0
f2fs-tools: remove printf warnings

* getopt() itself warns with a message.

Change-Id: I3feabc278a839b825c5f305f3790ee7a3684c88e
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.

Change-Id: Idf17801080d7bcb86f09db11301a4763d92e335e