Add missing include files to unittest

Common/Arm64Emitter.cpp

@@ -9,6 +9,7 @@
 #include <cinttypes>
 
 #include <stdlib.h>
+#include <string.h>
 
 #include "base/basictypes.h"
 

unittest/TestArm64Emitter.cpp

@@ -4,6 +4,8 @@
 #include "Core/MIPS/MIPSVFPUUtils.h"
 #include "Core/Util/DisArm64.h"
 
+#include <string.h>
+
 #include "UnitTest.h"
 
 static bool CheckLast(Arm64Gen::ARM64XEmitter &emit, const char *comp) {

unittest/TestArmEmitter.cpp

@@ -5,6 +5,8 @@
 #include "Core/MIPS/MIPSVFPUUtils.h"
 #include "ext/disarm.h"
 
+#include <string.h>
+
 #include "UnitTest.h"
 
 static bool CheckLast(ArmGen::ARMXEmitter &emit, const char *comp) {