build-artik: mksdfuse: do not use oflag=seek_bytes
build-artik: mksdfuse: do not use oflag=seek_bytes

The old version dd doesn't support the 'oflag=seek_bytes". We could do
same thing from using seek parameter. The bs=1M and seek=1 means
skipping 1MByte offset of output file.

Change-Id: I671062620f1877352f5c1e6f9738c4947318a6f7
Signed-off-by: Chanho Park <8ec285a53e21b773fd914e03c50e1b6431bc9aa8@samsung.com>

SamsungARTIK/build-artik