Swap order of ifdefs so Android's Atrac3+ works again.

Was caused by https://github.com/hrydgard/ppsspp/commit/1124ef91eafeb3ec63b01e39ccbdc8efa1572369. Fixes https://github.com/hrydgard/ppsspp/issues/3789.

Android also defines __ linux __ it seems. Thanks @unknownbrackets.