Files
zig/lib/libc
mihael 1f92162875 Reimplement cosh in libzigc
The function basically calls the Zig std's implementation.
The changes were tested by running:

```
$ ./build/stage3/bin/zig build -p stage4 -Denable-llvm -Dno-lib

$ stage4/bin/zig build test-libc -Dlibc-test-path=<LIBC-TEST-PATH> -Dtest-filter=cosh -fqemu -fwasmtime --summary line
Build Summary: 921/921 steps succeeded
```
2026-03-10 00:42:14 +01:00
..
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2026-03-10 00:42:14 +01:00
2026-03-10 00:42:14 +01:00