fix SwapTrackingAlloc initial conditions

Summary:
This diff fixes the initial conditions for SwapTrackingAlloc,
which fixes F14 tests on platforms that do not have intrinsics enabled.

Differential Revision: D16755857

fbshipit-source-id: a76d8093100cbc0c5ce8723daa0976673d942299

folly/container/test/TrackingTypes.h

@@ -288,7 +288,7 @@ inline size_t& testAllocationCount() {
 }
 
 inline size_t& testAllocationMaxCount() {
-  static thread_local size_t value{0};
+  static thread_local size_t value{std::numeric_limits<std::size_t>::max()};
   return value;
 }