Fix Unix-like builds.

Core/MIPS/MIPSDebugInterface.cpp

@@ -16,6 +16,7 @@
 // https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
 
 #include <string>
+#include <cstring>
 
 #include "Core/Debugger/Breakpoints.h"
 #include "Core/Debugger/SymbolMap.h"

Core/MIPS/x86/RegCache.cpp

@@ -15,6 +15,8 @@
 // Official git repository and contact information can be found at
 // https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
 
+#include <cstring>
+
 #include "Core/MIPS/MIPS.h"
 #include "Core/MIPS/MIPSTables.h"
 #include "Core/MIPS/MIPSAnalyst.h"

Core/MIPS/x86/RegCacheFPU.cpp

@@ -15,6 +15,7 @@
 // Official git repository and contact information can be found at
 // https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
 
+#include <cstring>
 
 #include "Common/Log.h"
 #include "Common/x64Emitter.h"