[llvm] [llvm][ELF]Add Shdr check for getBuildID (PR #126537)

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<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


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``````````bash
git-clang-format --diff 001ba42fe057de10942ac886c3bd82ee54373ddf f0ced50bd870b1dabde5073da942196cd9866461 --extensions h,cpp -- llvm/include/llvm/Object/ELFTypes.h llvm/lib/Object/BuildID.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Object/BuildID.cpp b/llvm/lib/Object/BuildID.cpp
index 4cfdf0f7af..08f1502b36 100644
--- a/llvm/lib/Object/BuildID.cpp
+++ b/llvm/lib/Object/BuildID.cpp
@@ -25,7 +25,7 @@ namespace {
 
 template <typename ELFT> BuildIDRef getBuildID(const ELFFile<ELFT> &Obj) {
   auto findBuildID = [&Obj](const auto &ShdrOrPhdr,
-                        uint64_t Alignment) -> std::optional<BuildIDRef> {
+                            uint64_t Alignment) -> std::optional<BuildIDRef> {
     Error Err = Error::success();
     for (auto N : Obj.notes(ShdrOrPhdr, Err))
       if (N.getType() == ELF::NT_GNU_BUILD_ID &&
@@ -41,7 +41,7 @@ template <typename ELFT> BuildIDRef getBuildID(const ELFFile<ELFT> &Obj) {
       if (S.sh_type != ELF::SHT_NOTE)
         continue;
       auto ShdrRes = findBuildID(S, S.sh_addralign);
-      if(ShdrRes)
+      if (ShdrRes)
         return ShdrRes.value();
     }
   }
@@ -53,9 +53,9 @@ template <typename ELFT> BuildIDRef getBuildID(const ELFFile<ELFT> &Obj) {
   for (const auto &P : *PhdrsOrErr) {
     if (P.p_type != ELF::PT_NOTE)
       continue;
-      auto PhdrRes = findBuildID(P, P.p_align);
-      if(PhdrRes)
-        return PhdrRes.value();
+    auto PhdrRes = findBuildID(P, P.p_align);
+    if (PhdrRes)
+      return PhdrRes.value();
   }
   return {};
 }

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https://github.com/llvm/llvm-project/pull/126537