Replaced read from /dev/random with /dev/urandom; fixed hangs on Ubuntu

samples/project/premake4.lua

@@ -42,5 +42,5 @@ solution "PremakeTestbox"
 		end
 	} 
 
-print(os.findlib("Xlib"))
+print(os.findlib("hal"))
 

src/host/os_uuid.c

@@ -26,7 +26,7 @@ int os_uuid(lua_State* L)
 	int result;
 
 	/* not sure how to get a UUID here, so I fake it */
-	FILE* rnd = fopen("/dev/random", "rb");
+	FILE* rnd = fopen("/dev/urandom", "rb");
 	result = fread(bytes, 16, 1, rnd);
 	fclose(rnd);
 	if (!result)