Merge change 2990 into donut

* changes:
  Add LD_LIBRARY_PATH support to bionic's linker
tree: 127fc944b35e74cda8fa69ebe16b0632c3bfe7f6
  1. .gitignore
  2. Android.mk
  3. libc/
  4. libdl/
  5. libm/
  6. libstdc++/
  7. libthread_db/
  8. linker/