* [opusfile] Initial integration
* add license header
* cleaned up loop in build script
* fix typo in build script
* changed fuzzer from C++ to C
* run ldconfig before building fuzzer
* Force static linking when building the fuzzer.
This alternative linker syntax overrides the "lib{whatever}.so" default.
Fortunately, Ubuntu packages static libraries in libopus-dev and
libogg-dev.
Co-authored-by: Michael Jezierny <mtjz@google.com>