libgcc_s: expose __divmoddi4 on i386

GCC has used this for some time (since 7.0) and apparently we were
getting away with using the hidden symbol, but when linking with
--no-undefined-version we get

libgcc_s: expose __divmoddi4 on i386

GCC has used this for some time (since 7.0) and apparently we were
getting away with using the hidden symbol, but when linking with
--no-undefined-version we get an error unless it's properly exported.
(For anyone who wonders at the assymetry, __udivmoddi4 is indeed much
older and was introduced with GCC 3.0.)

MFC after: 3 days
Reviewed by: dim
Differential Revision: https://reviews.freebsd.org/D44878

(cherry picked from commit 44e89340fe349abc020732958c6debd12b5adf2c)

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Merge llvm-project main llvmorg-18-init-15088-gd14ee76181fb

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvm-project main llvmorg-18-init-15088-gd14ee76181fb.

Merge llvm-project main llvmorg-18-init-15088-gd14ee76181fb

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvm-project main llvmorg-18-init-15088-gd14ee76181fb.

PR: 276104
MFC after: 1 month

(cherry picked from commit 5f757f3ff9144b609b3c433dfd370cc6bdc191ad)

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