Updates golang/go#44343
Fixes golang/go#61723

Change-Id: I920f2fad6b3a2a9ba67ff2fafea4319644a0bc8c
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Add wrappers for sched_getattr(2) and sched_setattr(2), as well as
various SCHED_ values usable for these.

The kludge in linux/types.go is needed so we can include both
linux/sched/types.h (for struct sched_attr) and sched.h (for a few
defines from include/bits/cpu-set.h).

Unfortunately, they both define struct sched_param, thus the need to
mask one of the definitions.

Change-Id: I3e13cf49ccef7ae81a75d33826d18de84a52106d
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
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Change-Id: I227118221df469a677f3ff140ca7b94acb7f9571
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Added detection for x86 AMX,
including AMX-Tile, AMX-INT8 and AMX-BF16
instruction sets.

Change-Id: Ib3d663430b64d46b46b22bdd05d40f1992e37ee0
GitHub-Last-Rev: 7986ed6
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Change-Id: I6dbed409b549ab2cfc862094f19373816b7c0859
Reviewed-on: https://go-review.googlesource.com/c/sys/+/519076
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The mkwinsyscall command has a hard limit of 15 on the
number of syscall arguments. Windows has several system
calls with more than 15 arguments, for example CreateFontPackage
has 18 arguments.

If the number of arguments is higher than 15 we use SyscallN.

Fixes golang/go#57914

Change-Id: I4205e779a960ae10c0778de7876154e0d7ec00a1
GitHub-Last-Rev: 1f1e96f
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Same as CL 520275 did in package syscall.

For golang/go#31316

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….21.0 for all

Running `GOOS=linux GOARCH={amd64,arm64,loong64,mips64le,riscv64} ./mkall.sh`
produces no changes, as expected.

Update Loong64's cross toolchain to support for the ELF psABI v2.0 relocs [1].

Updates #58784.

[1]: https://loongson.github.io/LoongArch-Documentation/LoongArch-ELF-ABI-EN.html

Change-Id: I676893b934d8cfc30b9f3702fc92a5ab82f7f116
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