perf build: Require at least clang 16.0.6 to build BPF skeletons

Howard reported problems using perf features that use BPF:

  perf $ clang -v
  Debian clang version 15.0.6
  Target: x86_64-pc-linux-gnu
  Thread model: posix
  InstalledDir: /bin
  Found candidate GCC installation: /bin/../lib/gcc/x86_64-linux-gnu/12
  Selected GCC installation: /bin/../lib/gcc/x86_64-linux-gnu/12
  Candidate multilib: .;@m64
  Selected multilib: .;@m64
  perf $ ./perf trace -e write --max-events=1
  libbpf: prog 'sys_enter_rename': BPF program load failed: Permission denied
  libbpf: prog 'sys_enter_rename': -- BEGIN PROG LOAD LOG --
  0: R1=ctx() R10=fp0

But it works with:

  perf $ clang -v
  Debian clang version 16.0.6 (15~deb12u1)
  Target: x86_64-pc-linux-gnu
  Thread model: posix
  InstalledDir: /bin
  Found candidate GCC installation: /bin/../lib/gcc/x86_64-linux-gnu/12
  Selected GCC installation: /bin/../lib/gcc/x86_64-linux-gnu/12
  Candidate multilib: .;@m64
  Selected multilib: .;@m64
  perf $ ./perf trace -e write --max-events=1
       0.000 ( 0.009 ms): gmain/1448 write(fd: 4, buf: \1\0\0\0\0\0\0\0, count: 8)                         = 8 (kworker/0:0-eve)
  perf $

So lets make that the required version, if you happen to have a slightly
older version where this work, please report so that we can adjust the
minimum required version.

Reported-by: Howard Chu <[email protected]>
Cc: Ian Rogers <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Alan Maguire <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Kan Liang <[email protected]>
Cc: Namhyung Kim <[email protected]>
Link: https://lore.kernel.org/lkml/ZuGL9ROeTV2uXoSp@x1
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

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