[ELF] - Revert r319747 "[ELF] - Show copy relocated symbols in a --Map file output.".

It broke bots:
http://lab.llvm.org:8011/builders/lld-x86_64-darwin13/builds/15570/steps/test_lld/logs/stdio
http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux-fast/builds/10930/steps/check-lld%20asan/logs/stdio
http://lab.llvm.org:8011/builders/lld-x86_64-win7/builds/16336/steps/test%20lld/logs/stdio

According to outputs,
.dynstr section has different sizes for some reason.

llvm-svn: 319749