CMake: Try add_library "lz4" if "lz4::lz4" is unavailable

general: Add missing pragma once

As we require the latest C++ standards to compile yuzu, checking for C++14 constexpr is not needed.

Set TX_TOKEN for transifex client

general: Fix spelling

sdl2_sink: Avoid loading a null string into a vector

I did some tests on my own fork, and we're writing to ~/.transifexrc but
the client can't seem to read that file. maybe issue with $HOME or
something.

Workaround is to set TX_TOKEN environment variable and now the pesky
~/.transifexrc file is not needed.

Co-authored-by: Mai <mathew1800@gmail.com>

The function prototype appears to care whether we are loading capture
devices or not, and SDL_GetAudioDeviceName has a parameter to use it,
but for some reason it isn't.

This puts `capture` where it goes.

Attempting to place a null string into a vector of strings causes an
error that closes the application.

Don't.

New transifex client needs migrating to.

fix a tiny spelling mistake

Kreato pointed this out over on discord.