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

[James Henderson via llvm-commits]

================
@@ -80,9 +82,10 @@ TEST(BuildIDTest, InvalidPhdrFileSizeNoShdrs) {
   BuildIDRef BuildID = getBuildID(&ElfOrErr.get());
   EXPECT_EQ(
       StringRef(reinterpret_cast<const char *>(BuildID.data()), BuildID.size()),
-      "\xAB\xB5\x0D\x82\xB6\xBD\xC8\x61");
+      "");
 }
 
+// the code handles a malformed section header that points at data outside the file.
----------------
jh7370 wrote:

```suggestion
// The code handles a malformed section header that points at data outside the file.
```

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