perf tools changes and fixes for v6.5: 2nd batch

Build:

 - Allow to generate vmlinux.h from BTF using `make GEN_VMLINUX_H=1`
   and skip if the vmlinux has no BTF.

 - Replace deprecated clang -target xxx option by --target=xxx.

perf record:

 - Print event attributes with well known type and config symbols in the
   debug output like below:

    # perf record -e cycles,cpu-clock -C0 -vv true
    <SNIP>
    ------------------------------------------------------------
    perf_event_attr:
      type                             0 (PERF_TYPE_HARDWARE)
      size                             136
      config                           0 (PERF_COUNT_HW_CPU_CYCLES)
      { sample_period, sample_freq }   4000
      sample_type                      IP|TID|TIME|CPU|PERIOD|IDENTIFIER
      read_format                      ID
      disabled                         1
      inherit                          1
      freq                             1
      sample_id_all                    1
      exclude_guest                    1
    ------------------------------------------------------------
    sys_perf_event_open: pid -1  cpu 0  group_fd -1  flags 0x8 = 5
    ------------------------------------------------------------
    perf_event_attr:
      type                             1 (PERF_TYPE_SOFTWARE)
      size                             136
      config                           0 (PERF_COUNT_SW_CPU_CLOCK)
      { sample_period, sample_freq }   4000
      sample_type                      IP|TID|TIME|CPU|PERIOD|IDENTIFIER
      read_format                      ID
      disabled                         1
      inherit                          1
      freq                             1
      sample_id_all                    1
      exclude_guest                    1

 - Update AMD IBS event error message since it now support per-process
   profiling but no priviledge filters.

    $ sudo perf record -e ibs_op//k -C 0
    Error:
    AMD IBS doesn't support privilege filtering. Try again without
    the privilege modifiers (like 'k') at the end.

perf lock contention:

 - Support CSV style output using -x option

    $ sudo perf lock con -ab -x, sleep 1
    # output: contended, total wait, max wait, avg wait, type, caller
    19, 194232, 21415, 10222, spinlock, process_one_work+0x1f0
    15, 162748, 23843, 10849, rwsem:R, do_user_addr_fault+0x40e
    4, 86740, 23415, 21685, rwlock:R, ep_poll_callback+0x2d
    1, 84281, 84281, 84281, mutex, iwl_mvm_async_handlers_wk+0x135
    8, 67608, 27404, 8451, spinlock, __queue_work+0x174
    3, 58616, 31125, 19538, rwsem:W, do_mprotect_pkey+0xff
    3, 52953, 21172, 17651, rwlock:W, do_epoll_wait+0x248
    2, 30324, 19704, 15162, rwsem:R, do_madvise+0x3ad
    1, 24619, 24619, 24619, spinlock, rcu_core+0xd4

 - Add --output option to save the data to a file not to be interfered
   by other debug messages.

Test:

 - Fix event parsing test on ARM where there's no raw PMU nor supports
   PERF_PMU_CAP_EXTENDED_HW_TYPE.

 - Update the lock contention test case for CSV output.

 - Fix a segfault in the daemon command test.

Vendor events (JSON):

 - Add has_event() to check if the given event is available on system
   at runtime.  On Intel machines, some transaction events may not be
   present when TSC extensions are disabled.

 - Update Intel event metrics.

Misc:

 - Sort symbols by name using an external array of pointers instead of
   a rbtree node in the symbol.  This will save 16-bytes or 24-bytes
   per symbol whether the sorting is actually requested or not.

 - Fix unwinding DWARF callstacks using libdw when --symfs option is
   used.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
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