needed_libraries: Fix cannot find section .dynamic

Fix the error `cannot find section .dynamic` when needed_libraries is
called on a static ELF executable.

Library/Homebrew/os/linux/elf.rb

@@ -117,6 +117,8 @@ module ELFShim
     end
 
     def needed_libraries_using_patchelf(path)
+      return [nil, []] unless path.dynamic_elf?
+
       patchelf = DevelopmentTools.locate "patchelf"
       if path.dylib?
         command = [patchelf, "--print-soname", path.expand_path.to_s]