whisper.objc doesn't build in Xcode

[toxtesters]

I have the latest Xcode installed, followed the setup instructions in the README.

I encountered two errors when building

1. "'cstdint' file not found" in the file ggml-common.h
   Xcode is saying that the C++ std library file is not found. I think this is because ggml-cpu-aarch64.cpp is being compiled with clang -x c. In the Xcode build settings I added a compiler flag to this file -x c++ and that seems to make the error go away.

After adding the -x c++ flag to that file I get a new error:

2. ~/Developer/whisper.cpp/ggml/src/ggml-aarch64.c Build input file cannot be found: '~Developer/whisper.cpp/ggml/src/ggml-aarch64.c'. Did you forget to declare this file as an output of a script phase or custom build rule which produces it?

Xcode is set up to build the files ggml-aarch64.c/h but they are not present anywhere. I don't see them anywhere after building from the command line with cmake.

[toxtesters]

I checked out v1.7.2 and it works perfectly out of the box.

Something was introduced in 1.7.3 or 1.7.4 which broke building whisper.objc with Xcode.

[ggerganov]

Yes, I noticed that the example no longer works. If you fix it, please open a PR.

[iamcgn]

I put a PR with a fix #2736