fdisk: always print warning for mis-aligned partitions

This patch restores the original fdisk behavior and always prints
information about misaligned partitions in 'p'print output.

Signed-off-by: Karel Zak <kzak@redhat.com>
libblkid: (gpt) use real sector size to set PTMAGIC_OFFSET

So stupid and 5 years old bug...

Signed-off-by: Karel Zak <kzak@redhat.com>
fdisk: update tests and clean up output

Signed-off-by: Karel Zak <kzak@redhat.com>
swapon: remove invalid error string print outs

To avoid messages like this:

$ swapon /dev/zram0
swapon: /dev/zram0: read swap header failed: Success

Signed-off-by: Sami Kerola <kerolasa@iki.fi>
tests: make ipcs limit calculations work when numbers are large

Test suite  failed when I ran it with kernel 3.16.  Error is the
following.

tests/ts/ipcs/limits2: line 31: [: 18446744073692774399: integer expression expected

Reference: http://lkml.iu.edu/hypermail/linux/kernel/1406.0/01869.html
Signed-off-by: Sami Kerola <kerolasa@iki.fi>