[llvm] [Support] Support 5-component VersionTuples (PR #181275)

[Jakub Kuderski via llvm-commits]

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@@ -121,7 +145,8 @@ class VersionTuple {
   /// provided, minor and subminor version numbers are considered to be zero.
   friend bool operator==(const VersionTuple &X, const VersionTuple &Y) {
     return X.Major == Y.Major && X.Minor == Y.Minor &&
-           X.Subminor == Y.Subminor && X.Build == Y.Build;
+           X.Subminor == Y.Subminor && X.Build == Y.Build &&
+           X.Subbuild == Y.Subbuild;
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kuhar wrote:

maybe define a helper `std::tuple<unsigned, unsigned, unsigned, unsigned, unsigned> as_tuple()` (or similar) and use across all comparison operators and in `empty()`?

https://github.com/llvm/llvm-project/pull/181275