x86-64 support on Android

We can do this now that the x86-64 JIT supports PIE.

JITIL is deliberately excluded from the GUI because it
doesn't support PIE yet. (JITIL will be used if it's
set in the INI, though.)

Source/Core/Core/PowerPC/PowerPC.cpp

@@ -5,6 +5,7 @@
 #include "Core/PowerPC/PowerPC.h"
 
 #include <cstring>
+#include <vector>
 
 #include "Common/Assert.h"
 #include "Common/ChunkFile.h"
@@ -180,6 +181,31 @@ static void InitializeCPUCore(int cpu_core)
   }
 }
 
+const std::vector<CPUCore>& AvailableCPUCores()
+{
+  static const std::vector<CPUCore> cpu_cores = {
+      CORE_INTERPRETER, CORE_CACHEDINTERPRETER,
+#ifdef _M_X86_64
+      CORE_JIT64, CORE_JITIL64,
+#elif defined(_M_ARM_64)
+      CORE_JITARM64,
+#endif
+  };
+
+  return cpu_cores;
+}
+
+CPUCore DefaultCPUCore()
+{
+#ifdef _M_X86_64
+  return CORE_JIT64;
+#elif defined(_M_ARM_64)
+  return CORE_JITARM64;
+#else
+  return CORE_CACHEDINTERPRETER;
+#endif
+}
+
 void Init(int cpu_core)
 {
   // NOTE: This function runs on EmuThread, not the CPU Thread.