Fix xcode15 build error on pytorchbenchmark

Summary:
How to repo
1. Install latest Xcode 15 from MSC;
2. arc focus2 -b //fbobjc/Apps/Internal/PyTorchBenchmark:workspace --force-with-wrong-xcode
3. build

Please refer to https://fb.workplace.com/groups/iOSAppChampions/permalink/6792364927464286/ for the details.

Reviewed By: aaronenyeshi, xuzhao9

Differential Revision: D47552566

fbshipit-source-id: 571a729f67f8cc8fc324850e9e7ba1b821f29fa3

libkineto/src/Config.cpp

@@ -32,7 +32,9 @@ using std::vector;
 
 namespace KINETO_NAMESPACE {
 
+#if __clang__ && __cplusplus < 201703L
 constexpr std::chrono::milliseconds Config::kControllerIntervalMsecs;
+#endif
 
 constexpr milliseconds kDefaultSamplePeriodMsecs(1000);
 constexpr milliseconds kDefaultMultiplexPeriodMsecs(1000);