Added the options to release notes

Author: kuilpd

llvm/docs/ReleaseNotes.rst

@@ -174,6 +174,10 @@ Changes to the LLVM tools
   ``--set-symbols-visibility`` options for ELF input to change the
   visibility of symbols.
 
+* llvm-objcopy now supports ``--skip-symbol`` and ``--skip-symbols`` options
+  for ELF input to skip the specified symbols when executing other options
+  that can change a symbol's name, binding or visibility.
+
 Changes to LLDB
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