Rename remaining linux32 symbols to linux32_*. Fix systrace for linux64.

[jhb]

Summary

Rename remaining linux32 symbols such as linux_sysent[] and
linux_syscallnames[] from linux_* to linux32_* to avoid conflicts with
linux64.ko. While here, add support for linux64 binaries to systrace.

• Update NOPROTO entries in amd64/linux/syscalls.master to match the main table to fix systrace build.
• Add a special case for union l_semun arguments to the systrace generation.
• The systrace_linux32 module now only builds the systrace_linux32.ko. module on amd64.
• Add a new systrace_linux module that builds on both i386 and amd64. For i386 it builds the existing systrace_linux.ko. For amd64 it builds a systrace_linux.ko for 64-bit binaries.

Test Plan

• This compiles. I have not tested it. If anyone has a setup for 64-bit Linux binaries I can test I would verify that kdump/truss works on them after this using my libsysdecode changes (I pulled these changes out of that branch). I haven't tried using systrace before, but using systrace on Linux binaries would be the most obvious way to test this.

[markj]

Looks ok to me modulo the comment.

Have you verified that the systrace modules at least load?

sys/cddl/dev/systrace/systrace.c

388 ↗

(On Diff #9555)

"linux2"?

[jhb]

• Fix typo.
• systrace_linux needs to depend on linux64 on amd64.

[jhb]

I verified that kldload of systrace_linux and systrace_linux32 on amd64 pulled in the right dependencies (linux64.ko and linux.ko respectively) and that dtrace -l showed the correct syscall entries (linux32 for linux.ko and linux for linux64.ko)