[Midnightbsd-cvs] src: pcb.h: add constant for linux gs switch

[laffer1 at midnightbsd.org]

Log Message:
-----------
add constant for linux gs switch

Modified Files:
--------------
    src/sys/amd64/include:
        pcb.h (r1.2 -> r1.3)
        (http://cvsweb.midnightbsd.org/src/sys/amd64/include/pcb.h?r1=1.2&r2=1.3)