Merge binutils-2_27-branch into master.

After this merge, the tree on master branch is identical to the
tree in binutils-2_27-branch, but moved to a binutils-2.27 sub-
directory. The old binutils-2.25 subdirectory has been removed.

Bug: 37683243
Test: ./ndk/checkbuild.py passed.
Test: ./toolchain/gcc/build.py passed and built binutils-2.27.

Change-Id: I5bacb1bff44b19845133f3344cb6ff26eb3616f6
tree: de5f65a61488cf0a213c9657d54200972bd66318
  1. binutils-2.27/