[llvm] [CAS] Add missing <sys/time.h> include to fix aarch64 build (PR #196193)

[Justin Fargnoli via llvm-commits]

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@@ -87,6 +87,9 @@
 #include "llvm/Support/Program.h"
 #include "llvm/Support/raw_ostream.h"
 #include <optional>
+#ifndef _WIN32
+#include <sys/time.h>
+#endif
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justinfargnoli wrote:

> On aarch64 Linux, building llvm/lib/CAS/UnifiedOnDiskCache.cpp fails because a symbol from <sys/time.h> is used transitively but the header is not directly included

I'm concerned that this may not be the right approach here. Typically, OS specific headers are wrapped by `libSupport`. Is there a specific file in `Support` that we could include to resolve this missing dependency? 


https://github.com/llvm/llvm-project/pull/196193