Merge change 2990 into donut

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