build: set language to C++

Set the language in the build to C++.

Change-Id: Ib429f64b57e29f1531d1daa89cebf252a3932249
Signed-off-by: Patrick Venture <venture@google.com>

build: add autotools files

Change-Id: I962b3deb556a21181cfa72b78edec35d006162be
Signed-off-by: Murulidhar Nataraju <murulidhar@in.ibm.com>