[common/client] platform: make timing waits portable

host/platform/Windows/src/platform.c

@@ -615,7 +615,7 @@ bool app_init(void)
   if (ods && !ods_start())
     DEBUG_WARN("Failed to setup capture of debug messages");
 
-  windowsSetTimerResolution();
+  lgTimeInit();
 
   // get the performance frequency for spinlocks
   QueryPerformanceFrequency(&app.perfFreq);

host/src/app.c

@@ -44,6 +44,7 @@
 #include <unistd.h>
 #include <stdlib.h>
 #include <string.h>
+#include <time.h>
 #include <math.h>
 
 #define CONFIG_FILE "looking-glass-host.ini"