move .clang-format file into position

The CI expects the .clang-format file to appear at the root of the
repository.

Also fixes the Language selection from C to Cpp.  Clang-format uses the
Cpp language specifier for both C and C++.

Fixes it to use spaces instead of tabs per:
https://github.com/openbmc/docs/blob/master/CONTRIBUTING.md#c

Change-Id: Ibcc40eeb04c73f53a33986bdc47d69e59d59373c
Signed-off-by: Patrick Venture <venture@google.com>
2 files changed