Update to v097r02 release.

byuu says:

Note: balanced/performance profiles still broken, sorry.

Changelog:
- added nall/GNUmakefile unique() function; used on linking phase of
  higan
- added nall/unique_pointer
- target-tomoko and {System}::Video updated to use
  unique_pointer<ClassName> instead of ClassName* [1]
- locate() updated to search multiple paths [2]
- GB: pass gekkio's if_ie_registers and boot_hwio-G test ROMs
- FC, GB, GBA: merge video/ into the PPU cores
- ruby: fixed ~AudioXAudio2() typo

[1] I expected this to cause new crashes on exit due to changing the
order of destruction of objects (and deleting things that weren't
deleted before), but ... so far, so good. I guess we'll see what crops
up, especially on OS X (which is already crashing for unknown reasons on
exit.)

[2] right now, the search paths are: programpath(), {configpath(),
"higan/"}, {localpath(), "higan/"}; but we can add as many more as we
want, and we can also add platform-specific versions.

ruby/audio/xaudio2.cpp

@@ -2,7 +2,7 @@
 #include <windows.h>
 
 struct AudioXAudio2 : Audio, public IXAudio2VoiceCallback {
-  AudioXAudio2() { term(); }
+  ~AudioXAudio2() { term(); }
 
   IXAudio2* pXAudio2 = nullptr;
   IXAudio2MasteringVoice* pMasterVoice = nullptr;