Revert two changes that break Android builds.

* Earlier versions of lld were able to replace Android's
  lld.gold and link most files.
* With two recent lld changes, debuggerd_test64 and some other files
  failed to link because libunwindstack.a is linked like --whole-archive.
  We need to revert the following two changes:
  * "Put undefined symbols from shared libraries in the symbol table."
     lld/trunk@326242
  * "Make undefined symbol in DSO to pull out object files from archive files."
     lld/trunk@325849

Bug: 74755833
Change-Id: I6f7d3573e656b00f40f1c45de6b1ab0787a1031b