linker: support `@(extra_linker_flags)` on WASM

[laytan]

Currently @(extra_linker_flags) does not do anything on WASM, it should probably pass them along to wasm-ld.

[Kelimion]

Are we not? I'm seeing extra_linker_flags here.

    #if defined(GB_SYSTEM_WINDOWS)
        result = system_exec_command_line_app("wasm-ld",
            "\"%.*s\\bin\\wasm-ld\" %s -o \"%.*s\" %.*s %.*s %s",
            LIT(build_context.ODIN_ROOT),
            inputs, LIT(output_filename), LIT(build_context.link_flags), LIT(build_context.extra_linker_flags),
            extra_orca_flags);
    #else
        result = system_exec_command_line_app("wasm-ld",
            "wasm-ld %s -o \"%.*s\" %.*s %.*s %s",
            inputs, LIT(output_filename),
            LIT(build_context.link_flags),
            LIT(build_context.extra_linker_flags),
            extra_orca_flags);
    #endif
        return result;
    }

[laytan]

No, for example:

package main

@(require, extra_linker_flags="foo")
foreign import foo "foo"

main :: proc() {}

Does not add these linker flags on the WASM targets

[gingerBill]

Should be trivial to add.