Collect .openbsd.syscalls sections into a new PT_OPENBSD_SYSCALLS segment.
This will be used soon to pin system calls to designated call sites.

ok deraadt@

merge lld-16.0.6

In the linkers, collect objects in section "openbsd.mutable" and place
them into a page-aligned region in the bss, with the right markers for
kernel/ld.so to identify the region and skip making it im

In the linkers, collect objects in section "openbsd.mutable" and place
them into a page-aligned region in the bss, with the right markers for
kernel/ld.so to identify the region and skip making it immutable.
While here, fix readelf/objdump versions to show all of this.
ok miod kettenis

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Import LLVM 13.0.0 release.

Import LLVM 11.1.0 release including clang, lld and lldb.

Import LLVM 10.0.1 including clang, lld and lldb.

Import LLVM 10.0.0 release including clang, lld and lldb.

ok hackroom
tested by plenty