dolphin/Externals/libiconv/include/iconv.h, branch master

dolphin/Externals/libiconv/include/iconv.h, branch master GameCube and Wii emulator Externals: Update libiconv to 1.18 2025-09-29T19:52:58+00:00 Joshua Vandaële joshua@vandaele.software 2025-09-28T19:30:16+00:00 a8b40a218c659eca91572a3b9a0d5c38bf87301a I also excluded libiconv from the Windows CMake builds since it's never used there

I also excluded libiconv from the Windows CMake builds since it's never used there