[PATCH] D34993: Hack to keep __real_foo

[Rafael Avila de Espindola via llvm-commits]

> I disagree with this. The current meaning of --wrap in other linkers is to redirect references to symbols, not to change the symbols themselves, so if anything, `__real_foo` and `foo` should have the same value and `__wrap_foo` a second, different value. (As an aside, the current test has three different values, not two, so is definitely wrong).

This actually implements the same behavior as bfd. The symbol references
become:

  201000:       ba 10 10 01 00          mov    $0x11010,%edx
  201005:       ba 10 10 01 00          mov    $0x11010,%edx
  20100a:       ba 00 10 01 00          mov    $0x11000,%edx

And the symbols in the symbol table are unchanged:

0000000000011000 A foo
0000000000011020 A __real_foo
0000000000011010 A __wrap_foo

Cheers,
Rafael