[boot-i386] Reduce differences with NetBSD

Change-Id: I50c183d283858a098f0766cf3053fa6e78ce06ad

Synchronize on NetBSD-CVS (2013/12/1 12:00:00 UTC)

- Fix for possible unset uid/gid in toproto
- Fix for default mtree style
- Update libelf
- Importing libexecinfo
- Resynchronize GCC, mpc, gm

Synchronize on NetBSD-CVS (2013/12/1 12:00:00 UTC)

- Fix for possible unset uid/gid in toproto
- Fix for default mtree style
- Update libelf
- Importing libexecinfo
- Resynchronize GCC, mpc, gmp, mpfr
- build.sh: Replace params with show-params.
This has been done as the make target has been renamed in the same
way, while a new target named params has been added. This new
target generates a file containing all the parameters, instead of
printing it on the console.
- Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
get getservbyport() out of the inner loop

Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091

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<machine/signal.h>

. use netbsd sigframe, sigcontext struct
. netbsd sigframe *contains* sigcontext; use that directly
in kernel sigsend
. drop two fields from minix x86 stackframe.h (process

<machine/signal.h>

. use netbsd sigframe, sigcontext struct
. netbsd sigframe *contains* sigcontext; use that directly
in kernel sigsend
. drop two fields from minix x86 stackframe.h (process context)
that were unused, retadr and st

use in-sigframe sigcontext

Change-Id: Ib59d699596dc3a78163dee59f19730482fdddf11

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use netbsd <sys/signal.h> and sigset_t

. create signals-related struct message type to store sigset_t
directly
. create notify-specific message types, so the generic NOTIFY_ARG
doesn't exist

use netbsd <sys/signal.h> and sigset_t

. create signals-related struct message type to store sigset_t
directly
. create notify-specific message types, so the generic NOTIFY_ARG
doesn't exist anymore
. various related test expansions, improvements, fixes
. add a few error-checks to sigismember() calls
. rename kernel call specific signals fields to SYS_*

Change-Id: I53c18999b5eaf0cfa0cb25f5330bee9e7ad2b478

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Removing obsolete _MINIX define

Change-Id: Id33ac7e973d1c0e249b690fe44a597474fac6076

Moving all NetBSD headers back where they belong.

Moving include/sys NetBSD headers to /sys/sys
Moving include/arch/*/ NetBSD headers to /sys/arch/*/include

Change-Id: Ia1a45d4e83ab806c84093ec2b61b

Moving all NetBSD headers back where they belong.

Moving include/sys NetBSD headers to /sys/sys
Moving include/arch/*/ NetBSD headers to /sys/arch/*/include

Change-Id: Ia1a45d4e83ab806c84093ec2b61bdbea9bed65a0

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