message: Fix the broken TFLite iOS example.
  The demo app is only relying on CocoaPod now, but it's incorrectly
  configured to use the headers on Github. It crashes the app when
  the header is different between Github and CocoaPod.
diff: GCC_WARN_UNUSED_VARIABLE = YES;
  HEADER_SEARCH_PATHS = (
  "$(inherited)",
  - ../../../../../../,
  - ../../../downloads/flatbuffers/include/,
  - ../../../downloads/eigen/,
  - ../../../downloads/,
  );
  IPHONEOS_DEPLOYMENT_TARGET = 8.0;
  MTL_ENABLE_DEBUG_INFO = YES;
  GCC_WARN_UNUSED_VARIABLE = YES;
  HEADER_SEARCH_PATHS = (
  "$(inherited)",
  - ../../../../../../,
  - ../../../downloads/flatbuffers/include/,
  - ../../../downloads/eigen/,
  - ../../../downloads/,
  );
  IPHONEOS_DEPLOYMENT_TARGET = 8.0;
  MTL_ENABLE_DEBUG_INFO = NO;
  