Function LLVMRustAddModuleFlagString

pub unsafe extern "C" fn LLVMRustAddModuleFlagString(
    M: &Module,
    MergeBehavior: ModuleFlagMergeBehavior,
    Name: *const c_char,
    NameLen: size_t,
    Value: *const c_char,
    ValueLen: size_t,
)