Change-Id: I71421a1a706a74d184a24dc9276b55005d7457b5
reserve src/ for the code of the main libraries: libwebp, libwebpdemux and libwebpmux + demote this library to internal only; i.e., don't install the header + lib with make install Change-Id: I8c9844db8f494be0fa0a2549a5b75b5cebcf666d