DragonFlyBSD/src 8d6d1e0sys/boot/pc32/boot2 Makefile, sys/boot/pc32/mbr Makefile

boot/pc32: Fix typo in mbr.

Wrong patch in faa6f4d7da5ad6ef2d3e68dd2671b6d6f8161a9b,
the generated mbr was still OK (bmake warning).

While there, only extract XREADORG constant from boot1*.out and not
from bootasmdef.nx in case it ever get one.
DeltaFile
+1-1sys/boot/pc32/boot2/Makefile
+1-1sys/boot/pc32/mbr/Makefile
+2-22 files

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