fallback reset_vector offset

[YhLu]

sometime the linuxbios.strip for fallback reset_vector will have 15 more
offset.

here I set ROM_IMAGE_SIZE 0x19200, and the linuxbios.strip will be 15 bytes
longer.  weird?

00191f0: 0000 0000 0000 0000 0000 0000 0000 e900
0019200: eeca fffe 0000 e900 ef18 fffe 0000 0000

YH