Several changes for timestamp bundle:

Fully defined the structure.
Single copy of it + single timer across all modules, managing it is now the responsibility of KernelState.

add global_critical_region::PrepareToAcquire, which uses Prefetchw on the global crit. We now know we can use Prefetchw on all cpus that have AVX.
add  KeQueryInterruptTime, which is used by some dashboards.

add threading::NanoSleep

src/xenia/base/clock.h

@@ -54,6 +54,8 @@ class Clock {
   // Queries the milliseconds since the host began.
   static uint64_t QueryHostUptimeMillis();
 
+  static uint64_t QueryHostInterruptTime();
+
   // Guest time scalar.
   static double guest_time_scalar();
   // Sets the guest time scalar, adjusting tick and wall clock speed.
@@ -81,6 +83,8 @@ class Clock {
   // Queries the milliseconds since the guest began, accounting for scaling.
   static uint32_t QueryGuestUptimeMillis();
 
+  static uint64_t QueryGuestInterruptTime();
+
   // Sets the system time of the guest.
   static void SetGuestSystemTime(uint64_t system_time);