binaryen 111.0 fails to compile due to -Werror warnings

[kpreid (Kevin Reid)]

:info:build In file included from /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_binaryen/binaryen/work/binaryen-111/src/wasm/wasm-debug.cpp:23:
:info:build In file included from /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_binaryen/binaryen/work/binaryen-111/third_party/llvm-project/include/llvm/include/llvm/DebugInfo/DWARFContext.h:12:
:info:build In file included from /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_binaryen/binaryen/work/binaryen-111/third_party/llvm-project/include/llvm/ADT/MapVector.h:19:
:info:build /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_binaryen/binaryen/work/binaryen-111/third_party/llvm-project/include/llvm/ADT/DenseMap.h:128:16: error: variable 'NumEntries' set but not used [-Werror,-Wunused-but-set-variable]
:info:build       unsigned NumEntries = getNumEntries();
:info:build                ^
:info:build /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_binaryen/binaryen/work/binaryen-111/src/wasm/wasm-binary.cpp:860:13: error: variable 'emitted' set but not used [-Werror,-Wunused-but-set-variable]
:info:build       Index emitted = 0;
:info:build             ^
:info:build 1 error generated.
:info:build make[2]: *** [src/wasm/CMakeFiles/wasm.dir/wasm-debug.cpp.o] Error 1

Previous ticket #66294 said

Yes, ports should not use -Werror precisely for this kind of reason.

and since this has come up twice now, perhaps that patch should be made.

[amaksoft (Andrei Makeev)]

In 620c6478ab08e04c536b9c295b65638b5e3d982f/macports-ports (master):

binaryen: don't enforce -Werror (​https://github.com/macports/macports-ports/pull/21955)

Closes: #68969