astrometry-net: fix audit after Python 3.8 bump

[iMichka]

• Have you followed the guidelines for contributing?
• Have you checked that there aren't other open pull requests for the same formula update/change?
• Have you built your formula locally with brew install --build-from-source <formula>, where <formula> is the name of the formula you're submitting?
• Is your test running fine brew test <formula>, where <formula> is the name of the formula you're submitting?
• Does your build pass brew audit --strict <formula> (after doing brew install <formula>)?

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[Bo98]

I have removed the Catalina bottle. I confirmed locally that it is broken: 85bffa8.

[Bo98]

solve-field.c:518:run_engine engine failed.  Command that failed was:
  /usr/local/Cellar/astrometry-net/0.79_2/bin/astrometry-engine --config 99.cfg ./apod4.axy
 ioutils.c:557:run_command_get_outputs Command was killed by signal 11
bash-3.2$ /usr/local/Cellar/astrometry-net/0.79_2/bin/astrometry-engine --config 99.cfg ./apod4.axy
Segmentation fault: 11
bash-3.2$ lldb -- /usr/local/Cellar/astrometry-net/0.79_2/bin/astrometry-engine --config 99.cfg ./apod4.axy                  
(lldb) target create "/usr/local/Cellar/astrometry-net/0.79_2/bin/astrometry-engine"
Current executable set to '/usr/local/Cellar/astrometry-net/0.79_2/bin/astrometry-engine' (x86_64).
(lldb) settings set -- target.run-args  "--config" "99.cfg" "./apod4.axy"
(lldb) run
Process 8979 launched: '/usr/local/Cellar/astrometry-net/0.79_2/bin/astrometry-engine' (x86_64)
Process 8979 stopped
* thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=EXC_I386_GPFLT)
    frame #0: 0x00007fff6f1ff3a6 libdyld.dylib`stack_not_16_byte_aligned_error
libdyld.dylib`stack_not_16_byte_aligned_error:
->  0x7fff6f1ff3a6 <+0>: movdqa %xmm0, (%rsp)
    0x7fff6f1ff3ab <+5>: int3   

libdyld.dylib`_dyld_fast_stub_entry:
    0x7fff6f1ff3ac <+0>: pushq  %rbp
    0x7fff6f1ff3ad <+1>: movq   %rsp, %rbp
Target 0: (astrometry-engine) stopped.

Try add:

ENV.append_to_cflags "-fno-stack-check" if DevelopmentTools.clang_build_version >= 1010