elf.rb: avoid corrupted elf files

Some elf files like unittest files or memory dumps may not be completely
readable by readelf.

Readelf will fail after the following message:
readelf: Warning: possibly corrupt ELF header - it has a non-zero program header offset, but no program headers

This patches avoid these files when there is a non zero offset but no
program headers

Library/Homebrew/os/linux/elf.rb

@@ -133,8 +133,10 @@ module ELFShim
       soname = nil
       needed = []
       command = ["readelf", "-d", path.expand_path.to_s]
-      lines = Utils.safe_popen_read(*command).split("\n")
+      lines = Utils.popen_read(*command, err: :out).split("\n")
       lines.each do |s|
+        next if s.start_with?("readelf: Warning: possibly corrupt ELF header")
+
         filename = s[/\[(.*)\]/, 1]
         next if filename.nil?