implement block linking + some refactoring

currently only supported for x64

src/ARMJIT_x64/ARMJIT_GenOffsets.cpp

@@ -0,0 +1,15 @@
+#include "../ARM.h"
+
+int main(int argc, char* argv[])
+{
+    FILE* f = fopen("ARMJIT_Offsets.h", "w");
+#define writeOffset(field) \
+        fprintf(f, "#define ARM_" #field "_offset 0x%x\n", offsetof(ARM, field))
+
+    writeOffset(CPSR);
+    writeOffset(Cycles);
+    writeOffset(StopExecution);
+
+    fclose(f);
+    return 0;
+}