message: always use the static version of libc++abi
  This is make it a lot easier to distributes binaries like cmgen or
  matc.
diff: @@ -122,7 +122,7 @@ if (LINUX)
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++")
  if (FILAMENT_REQUIRES_CXXABI)
  # Required in CI environment with custom libc++ and libc++abi
  - link_libraries("-lc++abi")
  + link_libraries(libc++abi.a)
  endif()
  # To distribute our binaries, we must remove the dependency on libc++ and libgcc.
  if (CMAKE_BUILD_TYPE STREQUAL "Release")
  