Ludwig's 1st diff: Some 64bit fixes for x86_64. Also fixes Makefile build.

code/game/q_shared.h

@@ -254,6 +254,8 @@ static inline float LittleFloat (const float l) { return FloatSwap(&l); }
 #define	CPUSTRING	"linux-i386"
 #elif defined __axp__
 #define	CPUSTRING	"linux-alpha"
+#elif defined __x86_64__
+#define	CPUSTRING	"linux-x86_64"
 #else
 #define	CPUSTRING	"linux-other"
 #endif