[llvm] [BOLT] Support runtime library hook via DT_INIT_ARRAY (PR #167467)

[Maksim Panchenko via llvm-commits]

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@@ -1419,6 +1503,10 @@ Error RewriteInstance::discoverRtFiniAddress() {
   }
 
   if (!BC->FiniArrayAddress || !BC->FiniArraySize) {
+    // It is still possible to generate profile without fini hook if
+    // InstrumentationSleepTime is set
+    if (opts::InstrumentationSleepTime > 0)
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maksfb wrote:

Since changes involving `opts::InstrumentationSleepTime` are unrelated to the `DT_INIT_ARRAY`, let's create a separate PR for them.

https://github.com/llvm/llvm-project/pull/167467