Updates WindCharger toolchain.

uClibc config is updated to fix a minor compatibility issue with
protobuf-3.0.0-a2.  This issue is caused by a missing PP macro.

Main updates include the uClibc config, the crosstool config, and the
README.  Everything else is binary.

Change-Id: I1d3769793b93199300cfd8ad2370bf623692f757
174 files changed