This is to keep the existing behavior with objdump.  It needs to show
symbol information of global variables like below:

   Percent |      Source code & Disassembly of elf for cycles:P (1 samples, percent: local period)
  ------------------------------------------------------------------------------------------------
           : 0                0xffffffff81338f70 <vm_normal_page>:
      0.00 :   ffffffff81338f70:       endbr64
      0.00 :   ffffffff81338f74:       callq   0xffffffff81083a40
      0.00 :   ffffffff81338f79:       movq    %rdi, %r8
      0.00 :   ffffffff81338f7c:       movq    %rdx, %rdi
      0.00 :   ffffffff81338f7f:       callq   *0x17021c3(%rip)   # ffffffff82a3b148 <pv_ops+0x1e8>
      0.00 :   ffffffff81338f85:       movq    0xffbf3c(%rip), %rdx       # ffffffff82334ec8 <physical_mask>
      0.00 :   ffffffff81338f8c:       testq   %rax, %rax                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
      0.00 :   ffffffff81338f8f:       je      0xffffffff81338fd0                         here
      0.00 :   ffffffff81338f91:       movq    %rax, %rcx
      0.00 :   ffffffff81338f94:       andl    $1, %ecx
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Changbin Du <changbin.du@huawei.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20240329215812.537846-6-namhyung@kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>