Add std=gnu++11 flag to compile .c files as C++.

Currently the -x c++ flag is used to compile .c files as C++.
For clang compilers, default extra C flags for Android .c files is -std=gnu99.
Clang compiler rejects -std=gnu99 in C++ mode.
Until we rename all .c file in this directory to .cpp, we can use this
patch to force compilation in -x c++ and -std=gnu++11.

Change-Id: Ibbb1c1394ac1cb45c6508a62986edf669e722cbd
1 file changed
tree: 02aee36492159052ee95f31f1671241d9766bf13
  1. doc/
  2. include/
  3. src/
  4. tests/
  5. tools/