[llvm] [BOLT] Detect Linux kernel version if the binary is a Linux kernel (PR #119088)

[Maksim Panchenko via llvm-commits]

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@@ -670,6 +698,8 @@ class BinaryContext {
   /// Indicates if the binary is Linux kernel.
   bool IsLinuxKernel{false};
 
+  LKVersion LinuxKernelVersion;
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maksfb wrote:

If we don't expect to use the kernel version outside of the `LinuxKernelRewriter`, I suggest we move it in there.

https://github.com/llvm/llvm-project/pull/119088