fdisk: use fdisk_{info,warn} on more places

Signed-off-by: Karel Zak <kzak@redhat.com>
libfdisk: extend fdisk_info() functionality

 - add per message flags
 - add fdisk_colon() for "foo bar: bla bla..." messages
 - add fdisk_sinfo() as smart version of fdisk_info()

Signed-off-by: Karel Zak <kzak@redhat.com>
libfdisk: use fdisk_colon() and fdisk_sinfo()

Signed-off-by: Karel Zak <kzak@redhat.com>
libfdisk: (gpt) use generic 'created partition' message

Signed-off-by: Karel Zak <kzak@redhat.com>